diff --git a/proguard.cfg b/proguard.cfg
index 5709d85..2e80a89 100644
--- a/proguard.cfg
+++ b/proguard.cfg
@@ -77,14 +77,6 @@
     java.lang.Object readResolve();
 }
 
-# Please specify classes to be kept explicitly in your package's configuration.
-# -keep class * extends android.app.Activity
-# -keep class * extends android.view.View
-# -keep class * extends android.app.Service
-# -keep class * extends android.content.BroadcastReceiver
-# -keep class * extends android.content.ContentProvider
-# -keep class * extends android.preference.Preference
-# -keep class * extends android.app.BackupAgent
 
 -keep class * implements android.os.Parcelable {
   public static final android.os.Parcelable$Creator *;
@@ -99,12 +91,15 @@
 -dontwarn android.support.**
 -keep class android.support.v4.** { *; }  
 -keep interface android.support.v4.app.** { *; }
--keep class cn.trinea.android.common.** { *; }
--keep class cn.trinea.android.view.** { *; }
 -keepattributes *Annotation*
 
 -dontskipnonpubliclibraryclasses
 -dontskipnonpubliclibraryclassmembers
 
 -dontwarn com.google.ads.**
--keep class com.google.**  {*;}
\ No newline at end of file
+-keep class com.google.**  {*;}
+
+# Keep cn.trinea
+-keep class cn.trinea.android.** { *; }
+-keepclassmembers class cn.trinea.android.** { *; }
+-dontwarn cn.trinea.android.**
\ No newline at end of file