diff --git a/dnsapi2.md b/dnsapi2.md
index 7495749..0f933aa 100644
--- a/dnsapi2.md
+++ b/dnsapi2.md
@@ -1886,7 +1886,7 @@ Report any bugs or issues [here](https://github.com/acmesh-official/acme.sh/issu
 Login to your [GCore](https://accounts.gcore.com/profile/api-tokens) account and create an API Key.
 
 ```sh
-export GCORE_Key="<your_gcore_api_key>"
+export GCORE_Key='<your_gcore_api_key>'
 ```
 
 To issue a cert, run command: