diff --git a/app/proguard.cfg b/app/proguard.cfg
index 6020b5751..69c65b14b 100644
--- a/app/proguard.cfg
+++ b/app/proguard.cfg
@@ -56,6 +56,9 @@
 -dontwarn com.squareup.okhttp.**
 -dontwarn okio.**
 
+# for RxJava:
+-dontwarn sun.misc.Unsafe
+
 -keep class android.support.v4.** { *; }
 -keep interface android.support.v4.** { *; }
 -keep class android.support.v7.** { *; }