diff --git a/Android.mk b/Android.mk
index 64ea777..4604e42 100644
--- a/Android.mk
+++ b/Android.mk
@@ -8,6 +8,6 @@
 LOCAL_PACKAGE_NAME := Provision
 LOCAL_CERTIFICATE := platform
 
-LOCAL_PROGUARD_ENABLED := disabled
+LOCAL_PROGUARD_FLAGS := -include $(LOCAL_PATH)/proguard.flags
 
 include $(BUILD_PACKAGE)
diff --git a/proguard.flags b/proguard.flags
new file mode 100644
index 0000000..a934979
--- /dev/null
+++ b/proguard.flags
@@ -0,0 +1 @@
+-keep class * extends android.app.Activity