diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index e0e3c316..0ddba873 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -210,7 +210,7 @@
 
     const firebaseConfig = {
       apiKey: {{ $.Site.Params.firebase.apiKey }},
-      authDomain: {{ $.Site.Params.firebase.apiKey }},
+      authDomain: {{ $.Site.Params.firebase.authDomain }},
       projectId: {{ $.Site.Params.firebase.projectId }},
       storageBucket: {{ $.Site.Params.firebase.storageBucket }},
       messagingSenderId: {{ $.Site.Params.firebase.messagingSenderId }},