diff --git a/lib/models/user.js b/lib/models/user.js
index 666275cd..f2e50b5a 100644
--- a/lib/models/user.js
+++ b/lib/models/user.js
@@ -115,10 +115,11 @@ module.exports = function (sequelize, DataTypes) {
         else photo += '?size=bigger'
         break
       case 'github':
-        if (profile.photos && profile.photos[0]) photo = profile.photos[0].value.replace('?', '')
-        else photo = 'https://avatars.githubusercontent.com/u/' + profile.id
-        if (bigger) photo += '?s=400'
-        else photo += '?s=96'
+        const photoURL = new URL(profile.photos && profile.photos[0]
+          ? profile.photos[0].value
+          : `https://avatars.githubusercontent.com/u/${profile.id}`)
+        photoURL.searchParams.set('s', bigger ? 400 : 96)
+        photo = photoURL.toString()
         break
       case 'gitlab':
         photo = profile.avatarUrl