4 files changed, 9 insertions, 5 deletions
diff --git a/core/Command/Security/ImportCertificate.php b/core/Command/Security/ImportCertificate.php
index 7d540bc946d..0d4ca70dabf 100644
--- a/core/Command/Security/ImportCertificate.php
+++ b/core/Command/Security/ImportCertificate.php
@@ -49,17 +49,18 @@ class ImportCertificate extends Base {
 			);
 	}
 
-	protected function execute(InputInterface $input, OutputInterface $output) {
+	protected function execute(InputInterface $input, OutputInterface $output): int {
 		$path = $input->getArgument('path');
 
 		if (!file_exists($path)) {
 			$output->writeln('<error>certificate not found</error>');
-			return;
+			return 1;
 		}
 
 		$certData = file_get_contents($path);
 		$name = basename($path);
 
 		$this->certificateManager->addCertificate($certData, $name);
+		return 0;
 	}
 }
diff --git a/core/Command/Security/ListCertificates.php b/core/Command/Security/ListCertificates.php
index 594fa1bc4d5..59cb92abe1d 100644
--- a/core/Command/Security/ListCertificates.php
+++ b/core/Command/Security/ListCertificates.php
@@ -50,7 +50,7 @@ class ListCertificates extends Base {
 		parent::configure();
 	}
 
-	protected function execute(InputInterface $input, OutputInterface $output) {
+	protected function execute(InputInterface $input, OutputInterface $output): int {
 		$outputType = $input->getOption('output');
 		if ($outputType === self::OUTPUT_FORMAT_JSON || $outputType === self::OUTPUT_FORMAT_JSON_PRETTY) {
 			$certificates = array_map(function (ICertificate $certificate) {
@@ -91,5 +91,6 @@ class ListCertificates extends Base {
 			$table->setRows($rows);
 			$table->render();
 		}
+		return 0;
 	}
 }
diff --git a/core/Command/Security/RemoveCertificate.php b/core/Command/Security/RemoveCertificate.php
index 4aa97a61757..fd0b536f299 100644
--- a/core/Command/Security/RemoveCertificate.php
+++ b/core/Command/Security/RemoveCertificate.php
@@ -50,9 +50,10 @@ class RemoveCertificate extends Base {
 			);
 	}
 
-	protected function execute(InputInterface $input, OutputInterface $output) {
+	protected function execute(InputInterface $input, OutputInterface $output): int {
 		$name = $input->getArgument('name');
 
 		$this->certificateManager->removeCertificate($name);
+		return 0;
 	}
 }
diff --git a/core/Command/Security/ResetBruteforceAttempts.php b/core/Command/Security/ResetBruteforceAttempts.php
index dcb827f8ddb..694b65c7acf 100644
--- a/core/Command/Security/ResetBruteforceAttempts.php
+++ b/core/Command/Security/ResetBruteforceAttempts.php
@@ -49,7 +49,7 @@ class ResetBruteforceAttempts extends Base {
 			);
 	}
 
-	protected function execute(InputInterface $input, OutputInterface $output) {
+	protected function execute(InputInterface $input, OutputInterface $output): int {
 		$ip = $input->getArgument('ipaddress');
 
 		if (!filter_var($ip, FILTER_VALIDATE_IP)) {
@@ -58,5 +58,6 @@ class ResetBruteforceAttempts extends Base {
 		}
 
 		$this->throttler->resetDelayForIP($ip);
+		return 0;
 	}
 }