diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/interceptor/Signing.kt b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/interceptor/Signing.kt
index 4bcafcd8..7e3af0ea 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/interceptor/Signing.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/interceptor/Signing.kt
@@ -39,7 +39,7 @@ object Signing {
     val appPassword by lazy {
         iLoveApple(
                 "ThisIsOurHardWorkPleaseDoNotCopyOrSteal(c)2019.KubaSz".sha256(),
-                BuildConfig.VERSION_NAME.substringBeforeLast('+'),
+                BuildConfig.VERSION_BASE.substringBeforeLast('+'),
                 BuildConfig.VERSION_CODE.toLong()
         )
     }