diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 33f84b9d2..cc05dd62d 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -18,3 +18,6 @@
 
 # Joda
 -dontwarn org.joda.time.**
+
+-keep class com.google.common.**
+-dontwarn com.google.common.**