diff --git a/.gitignore b/.gitignore
index e8de85d..a6d1586 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 *.log
 demo.php
+composer.json
+composer.lock
+vendor
diff --git a/composer.json b/composer.json
index c4e5bbc..1f477b9 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
     },
     "require": {
         "php": ">=7.0",
-	"workerman/workerman" : ">=3.1.8"
+	"workerman/workerman" : "^3.3"
     },
     "suggest": {
 	"ext-event": "For better performance."