diff --git a/src/store/src/Command/DropStoreCommand.php b/src/store/src/Command/DropStoreCommand.php
index 20d882987..e9651c1b8 100644
--- a/src/store/src/Command/DropStoreCommand.php
+++ b/src/store/src/Command/DropStoreCommand.php
@@ -64,7 +64,7 @@ protected function configure(): void
         ;
     }
 
-    protected function initialize(InputInterface $input, OutputInterface $output)
+    protected function initialize(InputInterface $input, OutputInterface $output): void
     {
         $storeName = $input->getArgument('store');
         if (!$this->stores->has($storeName)) {
diff --git a/src/store/src/Command/SetupStoreCommand.php b/src/store/src/Command/SetupStoreCommand.php
index 5e1f0df9b..51bca2c12 100644
--- a/src/store/src/Command/SetupStoreCommand.php
+++ b/src/store/src/Command/SetupStoreCommand.php
@@ -62,7 +62,7 @@ protected function configure(): void
         ;
     }
 
-    protected function initialize(InputInterface $input, OutputInterface $output)
+    protected function initialize(InputInterface $input, OutputInterface $output): void
     {
         $storeName = $input->getArgument('store');
         if (!$this->stores->has($storeName)) {