diff --git a/app/build.gradle b/app/build.gradle
index b799720..c105225 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -25,6 +25,8 @@ android {
     buildTypes {
         release {
             resValue "string", "app_name", "NextPush"
+            minifyEnabled true
+            shrinkResources true
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
         debug {
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 481bb43..528df2c 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -1,21 +1,8 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
+# keep classes used for Json deserializing
+-keep class org.unifiedpush.distributor.nextpush.api.response.** { *; }
+# keep classes used for Nextcloud SSO
+-keep class org.unifiedpush.distributor.nextpush.api.provider.** { *; }
 
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
-
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile
\ No newline at end of file
+# preserve line numbers for crash reporting
+-keepattributes SourceFile,LineNumberTable
+-renamesourcefileattribute SourceFile
\ No newline at end of file