diff --git a/app/proguard/app.pro b/app/proguard/app.pro
index cd39e808..0c00ff11 100644
--- a/app/proguard/app.pro
+++ b/app/proguard/app.pro
@@ -49,4 +49,13 @@
 # Most of volatile fields are updated with AFU and should not be mangled
 -keepclassmembernames class kotlinx.** {
     volatile <fields>;
-}
\ No newline at end of file
+}
+
+-keepclasseswithmembernames class * {
+    native <methods>;
+}
+
+-keep class pl.szczodrzynski.edziennik.data.api.szkolny.interceptor.Signing { public final byte[] pleaseStopRightNow(java.lang.String, long); }
+
+-keepclassmembernames class pl.szczodrzynski.edziennik.data.api.szkolny.request.** { *; }
+-keepclassmembernames class pl.szczodrzynski.edziennik.data.api.szkolny.response.** { *; }
\ No newline at end of file