diff --git a/app-k9mail/build.gradle.kts b/app-k9mail/build.gradle.kts
index a12a0ba93b4..328cc5e5699 100644
--- a/app-k9mail/build.gradle.kts
+++ b/app-k9mail/build.gradle.kts
@@ -18,7 +18,7 @@ android {
         testApplicationId = "com.fsck.k9.tests"
 
         versionCode = 39004
-        versionName = "14.0"
+        versionName = "15.0"
         versionNameSuffix = "a1"
 
         buildConfigField("String", "CLIENT_INFO_APP_NAME", "\"K-9 Mail\"")
diff --git a/app-thunderbird/build.gradle.kts b/app-thunderbird/build.gradle.kts
index 8e8b9c49655..42e90c34b62 100644
--- a/app-thunderbird/build.gradle.kts
+++ b/app-thunderbird/build.gradle.kts
@@ -18,7 +18,7 @@ android {
         testApplicationId = "net.thunderbird.android.tests"
 
         versionCode = 4
-        versionName = "14.0"
+        versionName = "15.0"
 
         buildConfigField("String", "CLIENT_INFO_APP_NAME", "\"Thunderbird for Android\"")
     }