diff --git a/Android.mk b/Android.mk
index 566e27e..0649be2 100644
--- a/Android.mk
+++ b/Android.mk
@@ -46,6 +46,7 @@
 LOCAL_PROGUARD_FLAG_FILES := proguard.flags
 
 LOCAL_SDK_VERSION := current
+LOCAL_MIN_SDK_VERSION := 21
 
 include $(BUILD_PACKAGE)
 
diff --git a/tests/Android.mk b/tests/Android.mk
index fe4c9b2..4fd947c 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -18,5 +18,6 @@
 LOCAL_INSTRUMENTATION_FOR := Contacts
 
 LOCAL_SDK_VERSION := current
+LOCAL_MIN_SDK_VERSION := 21
 
 include $(BUILD_PACKAGE)