diff --git a/acme.sh b/acme.sh
index 4829507b..d958b074 100755
--- a/acme.sh
+++ b/acme.sh
@@ -1281,6 +1281,7 @@ _create_account_key() {
   else
     #generate account key
     _createkey "$length" "$ACCOUNT_KEY_PATH"
+    chmod 600 "$ACCOUNT_KEY_PATH"
   fi
 
 }