diff --git a/src/extension.ts b/src/extension.ts
index ae7a779..9cc2ceb 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -12,7 +12,7 @@ export async function activate(context: vscode.ExtensionContext): Promise<void>
     const conf = vscode.workspace.getConfiguration('php');
     const executablePath = conf.get<string>('executablePath') || 'php';
 
-    const memoryLimit = conf.get<string>('memoryLimit') || '-1';
+    const memoryLimit = conf.get<string>('memoryLimit') || '4G';
 
     if (memoryLimit !== '-1' && !/^\d+[KMG]?$/.exec(memoryLimit)) {
         const selected = await vscode.window.showErrorMessage(