diff --git a/build.gradle b/build.gradle
index d8cc0c3..c273d3c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -20,7 +20,7 @@
     baseName = "payapi-service"
     manifest {
         attributes('Payapi-Version': rootProject.version)
-        writeTo(project.buildDir + "/classes/MATE-INF.MF")
+        writeTo(project.buildDir.toString() + "/classes/MATE-INF.MF")
     }
 }
 
@@ -37,6 +37,7 @@
 
     implementation 'org.postgresql:postgresql:42.2.5'
     implementation 'com.jcabi:jcabi-manifests:1.1'
+    implementation 'org.bitbucket.b_c:jose4j:0.6.3'
     implementation group: 'com.google.code.gson', name: 'gson', version: '2.8.5'
     implementation group: 'com.sun.jersey', name: 'jersey-client', version: '1.19'
     implementation group: 'javax.servlet', name: 'jstl', version: '1.2'