diff --git a/app/src/main/assets/pl-changelog.html b/app/src/main/assets/pl-changelog.html
index f874f195..165582ec 100644
--- a/app/src/main/assets/pl-changelog.html
+++ b/app/src/main/assets/pl-changelog.html
@@ -1,4 +1,4 @@
-<h3>Wersja 4.5-beta.1, 2021-02-21</h3>
+<h3>Wersja 4.5-beta.2, 2021-02-21</h3>
 <ul>
     <li>Vulcan: aplikacja Szkolny.eu zaktualizowana w związku z wygaszeniem aplikacji Dzienniczek+.</li>
 </ul>
diff --git a/app/src/main/cpp/szkolny-signing.cpp b/app/src/main/cpp/szkolny-signing.cpp
index e3e83dc8..b2b15406 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] = {
-	0x35, 0x4c, 0x9d, 0x0e, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  };
+	0x42, 0xf5, 0x8e, 0x53, 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 0adf1fbd..b15b6408 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 "$param1.MTIzNDU2Nzg5MDQLA8n9Ff===.$param2".sha256()
+        return "$param1.MTIzNDU2Nzg5MDL9U0lwJn===.$param2".sha256()
     }
 }
diff --git a/build.gradle b/build.gradle
index 8e776f3d..54a6a31b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,8 +5,8 @@ buildscript {
         kotlin_version = '1.4.30'
 
         release = [
-                versionName: "4.5-beta.1",
-                versionCode: 4050001
+                versionName: "4.5-beta.2",
+                versionCode: 4050002
         ]
 
         setup = [