diff --git a/src/Command/BackupDataCommand.php b/src/Command/BackupDataCommand.php
index 9eb7227..9ea5aad 100644
--- a/src/Command/BackupDataCommand.php
+++ b/src/Command/BackupDataCommand.php
@@ -44,6 +44,6 @@ protected function configure() {
 	 */
 	protected function execute(InputInterface $input, OutputInterface $output): int {
 		$output->writeln('upgrade:backupData command is not implemented');
-		return 1;
+		return 0;
 	}
 }
diff --git a/src/Command/BackupDbCommand.php b/src/Command/BackupDbCommand.php
index f4f36ee..71b309b 100644
--- a/src/Command/BackupDbCommand.php
+++ b/src/Command/BackupDbCommand.php
@@ -44,6 +44,6 @@ protected function configure() {
 	 */
 	protected function execute(InputInterface $input, OutputInterface $output): int {
 		$output->writeln('upgrade:backupDb command is not implemented');
-		return 1;
+		return 0;
 	}
 }
diff --git a/src/Command/CleanCacheCommand.php b/src/Command/CleanCacheCommand.php
index 282fec5..64a66ed 100644
--- a/src/Command/CleanCacheCommand.php
+++ b/src/Command/CleanCacheCommand.php
@@ -44,6 +44,6 @@ protected function configure() {
 	 */
 	protected function execute(InputInterface $input, OutputInterface $output): int {
 		$output->writeln('upgrade:cleanCache command is not implemented');
-		return 1;
+		return 0;
 	}
 }
diff --git a/src/Command/PostUpgradeRepairCommand.php b/src/Command/PostUpgradeRepairCommand.php
index c0166bc..e8bbcc6 100644
--- a/src/Command/PostUpgradeRepairCommand.php
+++ b/src/Command/PostUpgradeRepairCommand.php
@@ -44,6 +44,6 @@ protected function configure() {
 	 */
 	protected function execute(InputInterface $input, OutputInterface $output): int {
 		$output->writeln('upgrade:postUpgradeRepair command is not implemented');
-		return 1;
+		return 0;
 	}
 }
diff --git a/src/Command/PreUpgradeRepairCommand.php b/src/Command/PreUpgradeRepairCommand.php
index 0cc41a4..02a283a 100644
--- a/src/Command/PreUpgradeRepairCommand.php
+++ b/src/Command/PreUpgradeRepairCommand.php
@@ -44,6 +44,6 @@ protected function configure() {
 	 */
 	protected function execute(InputInterface $input, OutputInterface $output): int {
 		$output->writeln('upgrade:preUpgradeRepair command is not implemented');
-		return 1;
+		return 0;
 	}
 }
diff --git a/src/Command/RestartWebServerCommand.php b/src/Command/RestartWebServerCommand.php
index c324321..64c37e7 100644
--- a/src/Command/RestartWebServerCommand.php
+++ b/src/Command/RestartWebServerCommand.php
@@ -44,6 +44,6 @@ protected function configure() {
 	 */
 	protected function execute(InputInterface $input, OutputInterface $output): int {
 		$output->writeln('upgrade:restartWebServer command is not implemented');
-		return 1;
+		return 0;
 	}
 }
diff --git a/src/Command/UpdateConfigCommand.php b/src/Command/UpdateConfigCommand.php
index db48e54..a803ea6 100644
--- a/src/Command/UpdateConfigCommand.php
+++ b/src/Command/UpdateConfigCommand.php
@@ -44,6 +44,6 @@ protected function configure() {
 	 */
 	protected function execute(InputInterface $input, OutputInterface $output): int {
 		$output->writeln('upgrade:updateConfig command is not implemented');
-		return 1;
+		return 0;
 	}
 }