diff --git a/lib/aliases.bash b/lib/aliases.bash
index d58a723..50acc51 100644
--- a/lib/aliases.bash
+++ b/lib/aliases.bash
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 # List directory contents
 alias sl=ls
 alias ls='ls -G'        # Compact view, show colors
diff --git a/lib/appearance.bash b/lib/appearance.bash
index cde1af9..69ca55e 100644
--- a/lib/appearance.bash
+++ b/lib/appearance.bash
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 # colored grep
 export GREP_OPTIONS='--color=auto'
 export GREP_COLOR='1;33'
@@ -5,8 +7,5 @@
 # colored ls
 export LSCOLORS='Gxfxcxdxdxegedabagacad'
 
-# Apply theming defaults
-PS1="%n@%m:%~%# "
-
 # Load the theme
 source "$BASH/themes/$BASH_THEME/$BASH_THEME.bash"
\ No newline at end of file
diff --git a/lib/grep.bash b/lib/grep.bash
deleted file mode 100644
index 5cb6983..0000000
--- a/lib/grep.bash
+++ /dev/null
@@ -1,2 +0,0 @@
-export GREP_OPTIONS='--color=auto'
-export GREP_COLOR='1;32'
\ No newline at end of file
diff --git a/lib/history.bash b/lib/history.bash
index 23731c5..3d489e9 100644
--- a/lib/history.bash
+++ b/lib/history.bash
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 # append to bash_history if Terminal.app quits
 shopt -s histappend