diff --git a/src/app/api/auth/[...nextauth]/route.ts b/src/app/api/auth/[...nextauth]/route.ts
index e23c689..06af25e 100644
--- a/src/app/api/auth/[...nextauth]/route.ts
+++ b/src/app/api/auth/[...nextauth]/route.ts
@@ -36,7 +36,6 @@ export const AuthOptions: NextAuthOptions = {
         if (user === null || user.email === null) {
           return "/beta";
         }
-
         const dbUser: User[] = await db
           .select()
           .from(userTable)
@@ -65,8 +64,8 @@ export const AuthOptions: NextAuthOptions = {
         }
 
         // Set the user's ID from your database
-        user.dbId = dbUser[0].id;
-
+        // Because bigint isn't serializable, we need to convert it to a string
+        user.dbId = dbUser[0].id.toString();
         return true;
       } catch (error) {
         console.error("Error during sign-in: ", error);
diff --git a/src/types/next-auth.d.ts b/src/types/next-auth.d.ts
index e70ea32..31c6bd6 100644
--- a/src/types/next-auth.d.ts
+++ b/src/types/next-auth.d.ts
@@ -9,6 +9,6 @@ declare module "next-auth" {
     } & DefaultSession["user"];
   }
   interface User {
-    dbId: bigint;
+    dbId: string;
   }
 }