diff --git a/ssh/config b/ssh/config
index 8c0a9f3..0743700 100644
--- a/ssh/config
+++ b/ssh/config
@@ -7,6 +7,9 @@ Host github.com
     Hostname ssh.github.com
     Port 443
     User git
+    # set to personal_git by default
+    IdentityFile ~/.ssh/personal_git.pub
+    IdentitiesOnly yes
 
 # Personal GitHub
 Host personalgit