diff --git a/theme-screenshots/bakke-black.jpg b/theme-screenshots/bakke-black.jpg
deleted file mode 100644
index e5664b2..0000000
--- a/theme-screenshots/bakke-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/bakke-black.png b/theme-screenshots/bakke-black.png
new file mode 100644
index 0000000..6c8749d
--- /dev/null
+++ b/theme-screenshots/bakke-black.png
Binary files differ
diff --git a/theme-screenshots/bakke-white.jpg b/theme-screenshots/bakke-white.jpg
deleted file mode 100644
index 027b011..0000000
--- a/theme-screenshots/bakke-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/bakke-white.png b/theme-screenshots/bakke-white.png
new file mode 100644
index 0000000..1975177
--- /dev/null
+++ b/theme-screenshots/bakke-white.png
Binary files differ
diff --git a/theme-screenshots/bobby-black.jpg b/theme-screenshots/bobby-black.jpg
deleted file mode 100644
index bd164ab..0000000
--- a/theme-screenshots/bobby-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/bobby-black.png b/theme-screenshots/bobby-black.png
new file mode 100644
index 0000000..b9a3db0
--- /dev/null
+++ b/theme-screenshots/bobby-black.png
Binary files differ
diff --git a/theme-screenshots/bobby-white.jpg b/theme-screenshots/bobby-white.jpg
deleted file mode 100644
index 11ebc5a..0000000
--- a/theme-screenshots/bobby-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/bobby-white.png b/theme-screenshots/bobby-white.png
new file mode 100644
index 0000000..9eaa2f6
--- /dev/null
+++ b/theme-screenshots/bobby-white.png
Binary files differ
diff --git a/theme-screenshots/candy-black.jpg b/theme-screenshots/candy-black.jpg
deleted file mode 100644
index f025465..0000000
--- a/theme-screenshots/candy-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/candy-black.png b/theme-screenshots/candy-black.png
new file mode 100644
index 0000000..066f0e7
--- /dev/null
+++ b/theme-screenshots/candy-black.png
Binary files differ
diff --git a/theme-screenshots/candy-white.jpg b/theme-screenshots/candy-white.jpg
deleted file mode 100644
index bc3010e..0000000
--- a/theme-screenshots/candy-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/candy-white.png b/theme-screenshots/candy-white.png
new file mode 100644
index 0000000..aa77f18
--- /dev/null
+++ b/theme-screenshots/candy-white.png
Binary files differ
diff --git a/theme-screenshots/clean-black.jpg b/theme-screenshots/clean-black.jpg
deleted file mode 100644
index 07809dc..0000000
--- a/theme-screenshots/clean-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/clean-black.png b/theme-screenshots/clean-black.png
new file mode 100644
index 0000000..b72efb9
--- /dev/null
+++ b/theme-screenshots/clean-black.png
Binary files differ
diff --git a/theme-screenshots/clean-white.jpg b/theme-screenshots/clean-white.jpg
deleted file mode 100644
index f55dcc0..0000000
--- a/theme-screenshots/clean-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/clean-white.png b/theme-screenshots/clean-white.png
new file mode 100644
index 0000000..a65b895
--- /dev/null
+++ b/theme-screenshots/clean-white.png
Binary files differ
diff --git a/theme-screenshots/demula-black.jpg b/theme-screenshots/demula-black.jpg
deleted file mode 100644
index 2301503..0000000
--- a/theme-screenshots/demula-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/demula-black.png b/theme-screenshots/demula-black.png
new file mode 100644
index 0000000..5f4b5af
--- /dev/null
+++ b/theme-screenshots/demula-black.png
Binary files differ
diff --git a/theme-screenshots/demula-white.jpg b/theme-screenshots/demula-white.jpg
deleted file mode 100644
index 56f851d..0000000
--- a/theme-screenshots/demula-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/demula-white.png b/theme-screenshots/demula-white.png
new file mode 100644
index 0000000..248aa5e
--- /dev/null
+++ b/theme-screenshots/demula-white.png
Binary files differ
diff --git a/theme-screenshots/dos-black.jpg b/theme-screenshots/dos-black.jpg
deleted file mode 100644
index 524637d..0000000
--- a/theme-screenshots/dos-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/dos-black.png b/theme-screenshots/dos-black.png
new file mode 100644
index 0000000..b416e50
--- /dev/null
+++ b/theme-screenshots/dos-black.png
Binary files differ
diff --git a/theme-screenshots/dos-white.jpg b/theme-screenshots/dos-white.jpg
deleted file mode 100644
index d28e871..0000000
--- a/theme-screenshots/dos-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/dos-white.png b/theme-screenshots/dos-white.png
new file mode 100644
index 0000000..99699a1
--- /dev/null
+++ b/theme-screenshots/dos-white.png
Binary files differ
diff --git a/theme-screenshots/doubletime-black.jpg b/theme-screenshots/doubletime-black.jpg
deleted file mode 100644
index c0fefe7..0000000
--- a/theme-screenshots/doubletime-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/doubletime-black.png b/theme-screenshots/doubletime-black.png
new file mode 100644
index 0000000..8c152d0
--- /dev/null
+++ b/theme-screenshots/doubletime-black.png
Binary files differ
diff --git a/theme-screenshots/doubletime-white.jpg b/theme-screenshots/doubletime-white.jpg
deleted file mode 100644
index 8c490bb..0000000
--- a/theme-screenshots/doubletime-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/doubletime-white.png b/theme-screenshots/doubletime-white.png
new file mode 100644
index 0000000..3cd552b
--- /dev/null
+++ b/theme-screenshots/doubletime-white.png
Binary files differ
diff --git a/theme-screenshots/doubletime_multiline-black.jpg b/theme-screenshots/doubletime_multiline-black.jpg
deleted file mode 100644
index ca42761..0000000
--- a/theme-screenshots/doubletime_multiline-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/doubletime_multiline-black.png b/theme-screenshots/doubletime_multiline-black.png
new file mode 100644
index 0000000..49a8c7b
--- /dev/null
+++ b/theme-screenshots/doubletime_multiline-black.png
Binary files differ
diff --git a/theme-screenshots/doubletime_multiline-white.jpg b/theme-screenshots/doubletime_multiline-white.jpg
deleted file mode 100644
index 228d0f4..0000000
--- a/theme-screenshots/doubletime_multiline-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/doubletime_multiline-white.png b/theme-screenshots/doubletime_multiline-white.png
new file mode 100644
index 0000000..fa52706
--- /dev/null
+++ b/theme-screenshots/doubletime_multiline-white.png
Binary files differ
diff --git a/theme-screenshots/doubletime_multiline_pyonly-black.jpg b/theme-screenshots/doubletime_multiline_pyonly-black.jpg
deleted file mode 100644
index 5f06c56..0000000
--- a/theme-screenshots/doubletime_multiline_pyonly-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/doubletime_multiline_pyonly-black.png b/theme-screenshots/doubletime_multiline_pyonly-black.png
new file mode 100644
index 0000000..8456766
--- /dev/null
+++ b/theme-screenshots/doubletime_multiline_pyonly-black.png
Binary files differ
diff --git a/theme-screenshots/doubletime_multiline_pyonly-white.jpg b/theme-screenshots/doubletime_multiline_pyonly-white.jpg
deleted file mode 100644
index 6f3700a..0000000
--- a/theme-screenshots/doubletime_multiline_pyonly-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/doubletime_multiline_pyonly-white.png b/theme-screenshots/doubletime_multiline_pyonly-white.png
new file mode 100644
index 0000000..f3ea99c
--- /dev/null
+++ b/theme-screenshots/doubletime_multiline_pyonly-white.png
Binary files differ
diff --git a/theme-screenshots/envy-black.jpg b/theme-screenshots/envy-black.jpg
deleted file mode 100644
index 1df43b2..0000000
--- a/theme-screenshots/envy-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/envy-black.png b/theme-screenshots/envy-black.png
new file mode 100644
index 0000000..a9c7458
--- /dev/null
+++ b/theme-screenshots/envy-black.png
Binary files differ
diff --git a/theme-screenshots/envy-white.jpg b/theme-screenshots/envy-white.jpg
deleted file mode 100644
index 5ac9f84..0000000
--- a/theme-screenshots/envy-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/envy-white.png b/theme-screenshots/envy-white.png
new file mode 100644
index 0000000..41f10a2
--- /dev/null
+++ b/theme-screenshots/envy-white.png
Binary files differ
diff --git a/theme-screenshots/hawaii50-white.jpg b/theme-screenshots/hawaii50-white.jpg
deleted file mode 100644
index 8bafccd..0000000
--- a/theme-screenshots/hawaii50-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/hawaii50-white.png b/theme-screenshots/hawaii50-white.png
new file mode 100644
index 0000000..d04a79a
--- /dev/null
+++ b/theme-screenshots/hawaii50-white.png
Binary files differ
diff --git a/theme-screenshots/mbriggs-black.jpg b/theme-screenshots/mbriggs-black.jpg
deleted file mode 100644
index e7aa98a..0000000
--- a/theme-screenshots/mbriggs-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/mbriggs-black.png b/theme-screenshots/mbriggs-black.png
new file mode 100644
index 0000000..f079942
--- /dev/null
+++ b/theme-screenshots/mbriggs-black.png
Binary files differ
diff --git a/theme-screenshots/mbriggs-white.jpg b/theme-screenshots/mbriggs-white.jpg
deleted file mode 100644
index 94198c5..0000000
--- a/theme-screenshots/mbriggs-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/mbriggs-white.png b/theme-screenshots/mbriggs-white.png
new file mode 100644
index 0000000..0b11509
--- /dev/null
+++ b/theme-screenshots/mbriggs-white.png
Binary files differ
diff --git a/theme-screenshots/minimal-black.jpg b/theme-screenshots/minimal-black.jpg
deleted file mode 100644
index b7b3a57..0000000
--- a/theme-screenshots/minimal-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/minimal-black.png b/theme-screenshots/minimal-black.png
new file mode 100644
index 0000000..311e02c
--- /dev/null
+++ b/theme-screenshots/minimal-black.png
Binary files differ
diff --git a/theme-screenshots/minimal-white.jpg b/theme-screenshots/minimal-white.jpg
deleted file mode 100644
index e4a132e..0000000
--- a/theme-screenshots/minimal-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/minimal-white.png b/theme-screenshots/minimal-white.png
new file mode 100644
index 0000000..4e28438
--- /dev/null
+++ b/theme-screenshots/minimal-white.png
Binary files differ
diff --git a/theme-screenshots/modern-black.jpg b/theme-screenshots/modern-black.jpg
deleted file mode 100644
index 4577a8b..0000000
--- a/theme-screenshots/modern-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/modern-black.png b/theme-screenshots/modern-black.png
new file mode 100644
index 0000000..13af1ec
--- /dev/null
+++ b/theme-screenshots/modern-black.png
Binary files differ
diff --git a/theme-screenshots/modern-t-black.jpg b/theme-screenshots/modern-t-black.jpg
deleted file mode 100644
index 9d1c88f..0000000
--- a/theme-screenshots/modern-t-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/modern-t-black.png b/theme-screenshots/modern-t-black.png
new file mode 100644
index 0000000..cf196c6
--- /dev/null
+++ b/theme-screenshots/modern-t-black.png
Binary files differ
diff --git a/theme-screenshots/modern-t-white.jpg b/theme-screenshots/modern-t-white.jpg
deleted file mode 100644
index 6b3ae83..0000000
--- a/theme-screenshots/modern-t-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/modern-t-white.png b/theme-screenshots/modern-t-white.png
new file mode 100644
index 0000000..f6408ab
--- /dev/null
+++ b/theme-screenshots/modern-t-white.png
Binary files differ
diff --git a/theme-screenshots/modern-white.jpg b/theme-screenshots/modern-white.jpg
deleted file mode 100644
index 43d3095..0000000
--- a/theme-screenshots/modern-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/modern-white.png b/theme-screenshots/modern-white.png
new file mode 100644
index 0000000..34ccf6c
--- /dev/null
+++ b/theme-screenshots/modern-white.png
Binary files differ
diff --git a/theme-screenshots/n0qorg-black.jpg b/theme-screenshots/n0qorg-black.jpg
deleted file mode 100644
index 1905433..0000000
--- a/theme-screenshots/n0qorg-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/n0qorg-black.png b/theme-screenshots/n0qorg-black.png
new file mode 100644
index 0000000..123cf70
--- /dev/null
+++ b/theme-screenshots/n0qorg-black.png
Binary files differ
diff --git a/theme-screenshots/n0qorg-white.jpg b/theme-screenshots/n0qorg-white.jpg
deleted file mode 100644
index 0442e44..0000000
--- a/theme-screenshots/n0qorg-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/n0qorg-white.png b/theme-screenshots/n0qorg-white.png
new file mode 100644
index 0000000..a184083
--- /dev/null
+++ b/theme-screenshots/n0qorg-white.png
Binary files differ
diff --git a/theme-screenshots/nwinkler-black.jpg b/theme-screenshots/nwinkler-black.jpg
deleted file mode 100644
index eaf17db..0000000
--- a/theme-screenshots/nwinkler-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/nwinkler-black.png b/theme-screenshots/nwinkler-black.png
new file mode 100644
index 0000000..9a25a5f
--- /dev/null
+++ b/theme-screenshots/nwinkler-black.png
Binary files differ
diff --git a/theme-screenshots/nwinkler-white.jpg b/theme-screenshots/nwinkler-white.jpg
deleted file mode 100644
index 283074f..0000000
--- a/theme-screenshots/nwinkler-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/nwinkler-white.png b/theme-screenshots/nwinkler-white.png
new file mode 100644
index 0000000..1c682fd
--- /dev/null
+++ b/theme-screenshots/nwinkler-white.png
Binary files differ
diff --git a/theme-screenshots/pete-black.jpg b/theme-screenshots/pete-black.jpg
deleted file mode 100644
index 946ae50..0000000
--- a/theme-screenshots/pete-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/pete-black.png b/theme-screenshots/pete-black.png
new file mode 100644
index 0000000..f67bf78
--- /dev/null
+++ b/theme-screenshots/pete-black.png
Binary files differ
diff --git a/theme-screenshots/pete-white.jpg b/theme-screenshots/pete-white.jpg
deleted file mode 100644
index 9718136..0000000
--- a/theme-screenshots/pete-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/pete-white.png b/theme-screenshots/pete-white.png
new file mode 100644
index 0000000..99bb53b
--- /dev/null
+++ b/theme-screenshots/pete-white.png
Binary files differ
diff --git a/theme-screenshots/powerline-black.jpg b/theme-screenshots/powerline-black.jpg
deleted file mode 100644
index e418385..0000000
--- a/theme-screenshots/powerline-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/powerline-black.png b/theme-screenshots/powerline-black.png
new file mode 100644
index 0000000..bc2e099
--- /dev/null
+++ b/theme-screenshots/powerline-black.png
Binary files differ
diff --git a/theme-screenshots/powerline-plain-black.jpg b/theme-screenshots/powerline-plain-black.jpg
deleted file mode 100644
index b25a542..0000000
--- a/theme-screenshots/powerline-plain-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/powerline-plain-black.png b/theme-screenshots/powerline-plain-black.png
new file mode 100644
index 0000000..fe8c3e4
--- /dev/null
+++ b/theme-screenshots/powerline-plain-black.png
Binary files differ
diff --git a/theme-screenshots/powerline-plain-white.jpg b/theme-screenshots/powerline-plain-white.jpg
deleted file mode 100644
index fbb048c..0000000
--- a/theme-screenshots/powerline-plain-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/powerline-plain-white.png b/theme-screenshots/powerline-plain-white.png
new file mode 100644
index 0000000..623052d
--- /dev/null
+++ b/theme-screenshots/powerline-plain-white.png
Binary files differ
diff --git a/theme-screenshots/powerline-white.jpg b/theme-screenshots/powerline-white.jpg
deleted file mode 100644
index 472fd57..0000000
--- a/theme-screenshots/powerline-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/powerline-white.png b/theme-screenshots/powerline-white.png
new file mode 100644
index 0000000..b3ff5f4
--- /dev/null
+++ b/theme-screenshots/powerline-white.png
Binary files differ
diff --git a/theme-screenshots/pure-black.jpg b/theme-screenshots/pure-black.jpg
deleted file mode 100644
index c52239e..0000000
--- a/theme-screenshots/pure-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/pure-black.png b/theme-screenshots/pure-black.png
new file mode 100644
index 0000000..235e7b6
--- /dev/null
+++ b/theme-screenshots/pure-black.png
Binary files differ
diff --git a/theme-screenshots/pure-white.jpg b/theme-screenshots/pure-white.jpg
deleted file mode 100644
index beb37ed..0000000
--- a/theme-screenshots/pure-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/pure-white.png b/theme-screenshots/pure-white.png
new file mode 100644
index 0000000..5236d8e
--- /dev/null
+++ b/theme-screenshots/pure-white.png
Binary files differ
diff --git a/theme-screenshots/rainbowbrite-black.jpg b/theme-screenshots/rainbowbrite-black.jpg
deleted file mode 100644
index 6510620..0000000
--- a/theme-screenshots/rainbowbrite-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/rainbowbrite-black.png b/theme-screenshots/rainbowbrite-black.png
new file mode 100644
index 0000000..b62fff6
--- /dev/null
+++ b/theme-screenshots/rainbowbrite-black.png
Binary files differ
diff --git a/theme-screenshots/rainbowbrite-white.jpg b/theme-screenshots/rainbowbrite-white.jpg
deleted file mode 100644
index 6f3b32e..0000000
--- a/theme-screenshots/rainbowbrite-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/rainbowbrite-white.png b/theme-screenshots/rainbowbrite-white.png
new file mode 100644
index 0000000..72d39fb
--- /dev/null
+++ b/theme-screenshots/rainbowbrite-white.png
Binary files differ
diff --git a/theme-screenshots/rjorgenson-black.jpg b/theme-screenshots/rjorgenson-black.jpg
deleted file mode 100644
index 0441868..0000000
--- a/theme-screenshots/rjorgenson-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/rjorgenson-black.png b/theme-screenshots/rjorgenson-black.png
new file mode 100644
index 0000000..50585d6
--- /dev/null
+++ b/theme-screenshots/rjorgenson-black.png
Binary files differ
diff --git a/theme-screenshots/rjorgenson-white.jpg b/theme-screenshots/rjorgenson-white.jpg
deleted file mode 100644
index fbca987..0000000
--- a/theme-screenshots/rjorgenson-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/rjorgenson-white.png b/theme-screenshots/rjorgenson-white.png
new file mode 100644
index 0000000..e0a04b0
--- /dev/null
+++ b/theme-screenshots/rjorgenson-white.png
Binary files differ
diff --git a/theme-screenshots/sexy-black.jpg b/theme-screenshots/sexy-black.jpg
deleted file mode 100644
index 22b2b3c..0000000
--- a/theme-screenshots/sexy-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/sexy-black.png b/theme-screenshots/sexy-black.png
new file mode 100644
index 0000000..44d2289
--- /dev/null
+++ b/theme-screenshots/sexy-black.png
Binary files differ
diff --git a/theme-screenshots/sexy-white.jpg b/theme-screenshots/sexy-white.jpg
deleted file mode 100644
index ebb14a6..0000000
--- a/theme-screenshots/sexy-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/sexy-white.png b/theme-screenshots/sexy-white.png
new file mode 100644
index 0000000..746dab4
--- /dev/null
+++ b/theme-screenshots/sexy-white.png
Binary files differ
diff --git a/theme-screenshots/simple-black.jpg b/theme-screenshots/simple-black.jpg
deleted file mode 100644
index 38867dc..0000000
--- a/theme-screenshots/simple-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/simple-black.png b/theme-screenshots/simple-black.png
new file mode 100644
index 0000000..5ea3a20
--- /dev/null
+++ b/theme-screenshots/simple-black.png
Binary files differ
diff --git a/theme-screenshots/simple-white.jpg b/theme-screenshots/simple-white.jpg
deleted file mode 100644
index dd6c09e..0000000
--- a/theme-screenshots/simple-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/simple-white.png b/theme-screenshots/simple-white.png
new file mode 100644
index 0000000..44217f5
--- /dev/null
+++ b/theme-screenshots/simple-white.png
Binary files differ
diff --git a/theme-screenshots/sirup-black.jpg b/theme-screenshots/sirup-black.jpg
deleted file mode 100644
index 542f9fb..0000000
--- a/theme-screenshots/sirup-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/sirup-black.png b/theme-screenshots/sirup-black.png
new file mode 100644
index 0000000..c4c8cf5
--- /dev/null
+++ b/theme-screenshots/sirup-black.png
Binary files differ
diff --git a/theme-screenshots/sirup-white.jpg b/theme-screenshots/sirup-white.jpg
deleted file mode 100644
index ca967ca..0000000
--- a/theme-screenshots/sirup-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/sirup-white.png b/theme-screenshots/sirup-white.png
new file mode 100644
index 0000000..d73e5a8
--- /dev/null
+++ b/theme-screenshots/sirup-white.png
Binary files differ
diff --git a/theme-screenshots/standard-black.jpg b/theme-screenshots/standard-black.jpg
deleted file mode 100644
index bf90318..0000000
--- a/theme-screenshots/standard-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/standard-black.png b/theme-screenshots/standard-black.png
new file mode 100644
index 0000000..1435aef
--- /dev/null
+++ b/theme-screenshots/standard-black.png
Binary files differ
diff --git a/theme-screenshots/standard-white.jpg b/theme-screenshots/standard-white.jpg
deleted file mode 100644
index 12679bc..0000000
--- a/theme-screenshots/standard-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/standard-white.png b/theme-screenshots/standard-white.png
new file mode 100644
index 0000000..df5d83f
--- /dev/null
+++ b/theme-screenshots/standard-white.png
Binary files differ
diff --git a/theme-screenshots/tonka-black.jpg b/theme-screenshots/tonka-black.jpg
deleted file mode 100644
index 29d1c23..0000000
--- a/theme-screenshots/tonka-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/tonka-black.png b/theme-screenshots/tonka-black.png
new file mode 100644
index 0000000..d5091dc
--- /dev/null
+++ b/theme-screenshots/tonka-black.png
Binary files differ
diff --git a/theme-screenshots/tonka-white.jpg b/theme-screenshots/tonka-white.jpg
deleted file mode 100644
index aca5051..0000000
--- a/theme-screenshots/tonka-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/tonka-white.png b/theme-screenshots/tonka-white.png
new file mode 100644
index 0000000..c43eea5
--- /dev/null
+++ b/theme-screenshots/tonka-white.png
Binary files differ
diff --git a/theme-screenshots/tylenol-black.jpg b/theme-screenshots/tylenol-black.jpg
deleted file mode 100644
index 91e9935..0000000
--- a/theme-screenshots/tylenol-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/tylenol-black.png b/theme-screenshots/tylenol-black.png
new file mode 100644
index 0000000..d92e103
--- /dev/null
+++ b/theme-screenshots/tylenol-black.png
Binary files differ
diff --git a/theme-screenshots/tylenol-white.jpg b/theme-screenshots/tylenol-white.jpg
deleted file mode 100644
index 19a244c..0000000
--- a/theme-screenshots/tylenol-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/tylenol-white.png b/theme-screenshots/tylenol-white.png
new file mode 100644
index 0000000..05cb2d2
--- /dev/null
+++ b/theme-screenshots/tylenol-white.png
Binary files differ
diff --git a/theme-screenshots/zitron-black.jpg b/theme-screenshots/zitron-black.jpg
deleted file mode 100644
index 83ccb93..0000000
--- a/theme-screenshots/zitron-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/zitron-black.png b/theme-screenshots/zitron-black.png
new file mode 100644
index 0000000..15c679a
--- /dev/null
+++ b/theme-screenshots/zitron-black.png
Binary files differ
diff --git a/theme-screenshots/zitron-white.jpg b/theme-screenshots/zitron-white.jpg
deleted file mode 100644
index c3165aa..0000000
--- a/theme-screenshots/zitron-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/zitron-white.png b/theme-screenshots/zitron-white.png
new file mode 100644
index 0000000..21e29f9
--- /dev/null
+++ b/theme-screenshots/zitron-white.png
Binary files differ
diff --git a/theme-screenshots/zork-black.jpg b/theme-screenshots/zork-black.jpg
deleted file mode 100644
index 58ae209..0000000
--- a/theme-screenshots/zork-black.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/zork-black.png b/theme-screenshots/zork-black.png
new file mode 100644
index 0000000..a47a2b4
--- /dev/null
+++ b/theme-screenshots/zork-black.png
Binary files differ
diff --git a/theme-screenshots/zork-white.jpg b/theme-screenshots/zork-white.jpg
deleted file mode 100644
index efe0b51..0000000
--- a/theme-screenshots/zork-white.jpg
+++ /dev/null
Binary files differ
diff --git a/theme-screenshots/zork-white.png b/theme-screenshots/zork-white.png
new file mode 100644
index 0000000..5dbd5ab
--- /dev/null
+++ b/theme-screenshots/zork-white.png
Binary files differ