diff --git a/Android.mk b/Android.mk
index 1efed08..b565774 100644
--- a/Android.mk
+++ b/Android.mk
@@ -24,14 +24,23 @@
 LOCAL_PRIVILEGED_MODULE := true
 
 LOCAL_STATIC_ANDROID_LIBRARIES := \
-    android-support-v4
+    android-support-v4 \
+    android-support-v13 \
+    android-support-v7-appcompat \
+    android-support-v7-cardview \
+    android-support-v7-preference \
+    android-support-v7-recyclerview \
+    android-support-v14-preference
 
 LOCAL_USE_AAPT2 := true
 
 LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res
 
 LOCAL_SRC_FILES := \
-    $(call all-java-files-under, src)
+    $(call all-java-files-under, src) \
+    $(call all-proto-files-under, proto)
+
+LOCAL_PROTOC_OPTIMIZE_TYPE := nano
 
 include $(BUILD_PACKAGE)