diff --git a/libraries/proguard-guava.pro b/libraries/proguard-guava.pro
index 898255b..4d08824 100644
--- a/libraries/proguard-guava.pro
+++ b/libraries/proguard-guava.pro
@@ -29,3 +29,7 @@
 -dontwarn java.lang.ClassValue
 -dontwarn com.google.j2objc.annotations.Weak
 -dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
+
+#Guava 20.0
+-dontwarn com.google.errorprone.annotations.**
+-dontwarn com.google.j2objc.annotations.RetainedWith