diff --git a/java/proguard.flags b/java/proguard.flags
index 5ce0c273c284e276c8d4dacef08eadbf7fb061ba..a5a667987a636434f2c2dcb20f0b91f17eb4d716 100644
--- a/java/proguard.flags
+++ b/java/proguard.flags
@@ -38,3 +38,9 @@
 -keep class com.android.inputmethod.keyboard.MoreKeysKeyboard$Builder$MoreKeysKeyboardParams {
   <init>(...);
 }
+
+# The support library contains references to newer platform versions.
+# Don't warn about those in case this app is linking against an older
+# platform version.  We know about them, and they are safe.
+-dontwarn android.support.v4.**
+-dontwarn android.support.v13.**