diff --git a/inrt/build.gradle b/inrt/build.gradle
index 0a08778e..3d8c69eb 100644
--- a/inrt/build.gradle
+++ b/inrt/build.gradle
@@ -17,10 +17,14 @@ android {
 
     }
     buildTypes {
-        release {
+        debug {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
+        release {
+            minifyEnabled true
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
     }
 }
 
diff --git a/inrt/proguard-rules.pro b/inrt/proguard-rules.pro
index 27b6816c..94c25044 100644
--- a/inrt/proguard-rules.pro
+++ b/inrt/proguard-rules.pro
@@ -23,3 +23,7 @@
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
+
+-dontwarn org.mozilla.javascript.**
+-dontwarn jackpal.androidterm.**
+-keep class org.mozilla.javascript.** { *; }
\ No newline at end of file