diff --git a/_config.yml b/_config.yml
index e912778..13bd8e3 100644
--- a/_config.yml
+++ b/_config.yml
@@ -98,7 +98,7 @@ ignore:
 # Extensions
 ## Plugins: https://hexo.io/plugins/
 ## Themes: https://hexo.io/themes/
-theme: cactus
+theme: 'cactus'
 
 # Deployment
 ## Docs: https://hexo.io/docs/one-command-deployment