diff --git a/src/Console/Command/BuildCommand.php b/src/Console/Command/BuildCommand.php
index 010b1d7..fc92923 100644
--- a/src/Console/Command/BuildCommand.php
+++ b/src/Console/Command/BuildCommand.php
@@ -64,7 +64,7 @@ final class BuildCommand extends AbstractCommand
                         if ($isDockerCompose) {
                             $process = Process::create(
                                 command: ['docker', 'compose', 'build'],
-                                extraArgs: explode(separator: ' ', string: $extraArgs),
+                                extraArgs: explode(separator: ' ', string: strval($extraArgs)),
                                 workingDir: $workingDir,
                             );
 
@@ -79,7 +79,7 @@ final class BuildCommand extends AbstractCommand
                     case ProjectType::Sculpin->value:
                         $process = Process::create(
                             command: ['./vendor/bin/sculpin', 'generate'],
-                            extraArgs: explode(separator: ' ', string: $extraArgs),
+                            extraArgs: explode(separator: ' ', string: strval($extraArgs)),
                             workingDir: $workingDir,
                         );
 
@@ -92,7 +92,7 @@ final class BuildCommand extends AbstractCommand
                     case ProjectType::Fractal->value:
                         $process = Process::create(
                             command: ['npx', 'fractal', 'build'],
-                            extraArgs: explode(separator: ' ', string: $extraArgs),
+                            extraArgs: explode(separator: ' ', string: strval($extraArgs)),
                             workingDir: $workingDir,
                         );
 
diff --git a/src/Console/Command/InstallCommand.php b/src/Console/Command/InstallCommand.php
index 9b147a2..7270c39 100644
--- a/src/Console/Command/InstallCommand.php
+++ b/src/Console/Command/InstallCommand.php
@@ -31,7 +31,7 @@ final class InstallCommand extends AbstractCommand
                 language: $language,
                 workingDir: $workingDir,
             ),
-            extraArgs: explode(separator: ' ', string: $extraArgs),
+            extraArgs: explode(separator: ' ', string: strval($extraArgs)),
             workingDir: $workingDir,
         );
 
diff --git a/src/Process/Process.php b/src/Process/Process.php
index fe5f87d..e4b1867 100644
--- a/src/Process/Process.php
+++ b/src/Process/Process.php
@@ -14,7 +14,7 @@ final class Process
     /**
      * @param non-empty-array<int, non-empty-string> $command
      * @param string $workingDir
-     * @param non-empty-string[] $extraArgs
+     * @param string[] $extraArgs
      */
     public static function create(array $command, string $workingDir, array $extraArgs = []): SymfonyProcess
     {