diff --git a/app/src/main/assets/pl-changelog.html b/app/src/main/assets/pl-changelog.html
index c0c15dc1..00648711 100644
--- a/app/src/main/assets/pl-changelog.html
+++ b/app/src/main/assets/pl-changelog.html
@@ -1,4 +1,4 @@
-<h3>Wersja 4.13.2-rc.3, 2022-11-25</h3>
+<h3>Wersja 4.13.2-rc.4, 2022-11-25</h3>
 <ul>
     <li>Poprawiono synchronizację w Mobidzienniku bez adresu e-mail.</li>
     <li>Poprawiono błąd synchronizacji w Vulcanie.</li>
diff --git a/app/src/main/cpp/szkolny-signing.cpp b/app/src/main/cpp/szkolny-signing.cpp
index c13f4152..bbafe06e 100644
--- a/app/src/main/cpp/szkolny-signing.cpp
+++ b/app/src/main/cpp/szkolny-signing.cpp
@@ -9,7 +9,7 @@
 
 /*secret password - removed for source code publication*/
 static toys AES_IV[16] = {
-	0xff, 0xc3, 0xe3, 0x82, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  };
+	0xc5, 0x67, 0x62, 0x67, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  };
 
 unsigned char *agony(unsigned int laugh, unsigned char *box, unsigned char *heat);
 
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 69270fde..e06a5d2b 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
@@ -46,6 +46,6 @@ object Signing {
 
     /*fun provideKey(param1: String, param2: Long): ByteArray {*/
     fun pleaseStopRightNow(param1: String, param2: Long): ByteArray {
-        return "$param1.MTIzNDU2Nzg5MDKkgTGqLh===.$param2".sha256()
+        return "$param1.MTIzNDU2Nzg5MDLWJ/cfbN===.$param2".sha256()
     }
 }
diff --git a/build.gradle b/build.gradle
index 62c11abe..5a8ba98c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,8 +5,8 @@ buildscript {
         kotlin_version = '1.6.10'
 
         release = [
-                versionName: "4.13.2-rc.3",
-                versionCode: 4130230
+                versionName: "4.13.2-rc.4",
+                versionCode: 4130240
         ]
 
         setup = [