diff --git a/proj-android/PowerAuthLibrary/proguard-rules.pro b/proj-android/PowerAuthLibrary/proguard-rules.pro
index 02e4f0ab..5cc0b252 100644
--- a/proj-android/PowerAuthLibrary/proguard-rules.pro
+++ b/proj-android/PowerAuthLibrary/proguard-rules.pro
@@ -19,12 +19,19 @@
     <init>(...);
     <fields>;
 }
+-keep class io.getlime.security.powerauth.ecies.EciesMetadata {
+    <fields>;
+}
 -keep class io.getlime.security.powerauth.sdk.impl.PowerAuthPrivateTokenData {
     <fields>;
 }
 -keepclassmembers class io.getlime.core.rest.model.** {
     <fields>;
 }
--keepclassmembers class io.getlime.security.powerauth.networking.model.** {
+# necessary for R8 fullMode
+-keep, allowobfuscation class io.getlime.core.rest.model.**
+
+-keep class io.getlime.security.powerauth.networking.model.** {
     <fields>;
 }
+