diff --git a/.env.example b/.env.example
index 143a06fd9..85b197214 100644
--- a/.env.example
+++ b/.env.example
@@ -5,6 +5,5 @@ DATABASE_URL=postgresql://sendou@localhost:5432/sendou_ink?schema=public
 // you can get them by making an application on https://discord.com/developers
 DISCORD_CLIENT_ID=
 DISCORD_CLIENT_SECRET=
-DISCORD_CALLBACK_URL=http://localhost:3000/auth/discord/callback
 COOKIE_SECRET=
-FRONT_PAGE_URL=http://localhost:3000
+FRONT_PAGE_URL=http://localhost:3000/
diff --git a/server/auth.ts b/server/auth.ts
index 882349196..8523efe50 100644
--- a/server/auth.ts
+++ b/server/auth.ts
@@ -21,10 +21,6 @@ export function setUpAuth(app: Express): void {
     process.env.DISCORD_CLIENT_SECRET,
     "env var DISCORD_CLIENT_SECRET undefined"
   );
-  invariant(
-    process.env.DISCORD_CALLBACK_URL,
-    "env var DISCORD_CALLBACK_URL undefined"
-  );
   invariant(process.env.COOKIE_SECRET, "env var COOKIE_SECRET undefined");
 
   passport.use(
@@ -32,7 +28,7 @@ export function setUpAuth(app: Express): void {
       {
         clientID: process.env.DISCORD_CLIENT_ID,
         clientSecret: process.env.DISCORD_CLIENT_SECRET,
-        callbackURL: process.env.DISCORD_CALLBACK_URL,
+        callbackURL: `${process.env.FRONT_PAGE_URL}auth/discord/callback`,
         scope: ["identify", "connections"],
       },
       function (_accessToken, refreshToken, loggedInUser, cb) {