diff --git a/OpenKeychain/proguard-rules-bouncycastle.pro b/OpenKeychain/proguard-rules-bouncycastle.pro
index e050ded81..edda4fc17 100644
--- a/OpenKeychain/proguard-rules-bouncycastle.pro
+++ b/OpenKeychain/proguard-rules-bouncycastle.pro
@@ -1,3 +1,4 @@
 -keep class org.bouncycastle.jcajce.provider.** { *; }
+-keep class org.bouncycastle.jce.provider.** { *; }
 
 -dontwarn javax.naming.**