diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 51c3a8899..896c73fd4 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -19,8 +19,8 @@ android {
     defaultConfig {
         applicationId = "at.bitfire.davdroid"
 
-        versionCode = 405000000
-        versionName = "4.5"
+        versionCode = 405010000
+        versionName = "4.5.1-alpha.1"
 
         setProperty("archivesBaseName", "davx5-ose-$versionName")