diff --git a/F-Droid/proguard-rules.pro b/F-Droid/proguard-rules.pro
index 2f0e52c56..55e1dea53 100644
--- a/F-Droid/proguard-rules.pro
+++ b/F-Droid/proguard-rules.pro
@@ -48,3 +48,5 @@
 -keep public class * extends android.support.v4.view.ActionProvider {
     public <init>(android.content.Context);
 }
+
+-keep class kellinwood.security.zipsigner.** {*;}