diff --git a/rafts/frontend/src/app/api/auth/[...nextauth]/route.ts b/rafts/frontend/src/app/api/auth/[...nextauth]/route.ts
index af53c8e5..370ff0cb 100644
--- a/rafts/frontend/src/app/api/auth/[...nextauth]/route.ts
+++ b/rafts/frontend/src/app/api/auth/[...nextauth]/route.ts
@@ -65,30 +65,6 @@
  ************************************************************************
  */
 
-import { NextRequest } from 'next/server'
 import { GET as AuthGET, POST as AuthPOST } from '@/auth/cadc-auth/credentials'
 
-const basePath = process.env.NEXT_PUBLIC_BASE_PATH || ''
-
-// Fix the URL path for NextAuth v5 which doesn't handle base paths well
-function fixUrl(req: NextRequest): NextRequest {
-  if (!basePath) return req
-
-  const url = new URL(req.url)
-  // Remove the base path from the pathname for NextAuth processing
-  if (url.pathname.startsWith(`${basePath}/api/auth`)) {
-    url.pathname = url.pathname.replace(basePath, '')
-  }
-
-  return new NextRequest(url, req)
-}
-
-export async function GET(req: NextRequest) {
-  const fixedReq = fixUrl(req)
-  return AuthGET(fixedReq)
-}
-
-export async function POST(req: NextRequest) {
-  const fixedReq = fixUrl(req)
-  return AuthPOST(fixedReq)
-}
+export { AuthGET as GET, AuthPOST as POST }
diff --git a/rafts/frontend/src/auth/cadc-auth/credentials.ts b/rafts/frontend/src/auth/cadc-auth/credentials.ts
index 6f706b1e..50b458b3 100644
--- a/rafts/frontend/src/auth/cadc-auth/credentials.ts
+++ b/rafts/frontend/src/auth/cadc-auth/credentials.ts
@@ -72,12 +72,15 @@ import { fetchUserInfo } from './fetchUserInfo'
 import { fetchUserGroups } from './fetchUserGroups'
 import { authenticateUser } from '@/auth/cadc-auth/authenticateUser'
 
+const appBasePath = process.env.NEXT_PUBLIC_BASE_PATH || ''
+
 export const {
   handlers: { GET, POST },
   auth,
   signIn,
   signOut,
 } = NextAuth({
+  basePath: `${appBasePath}/api/auth`,
   providers: [
     CredentialsProvider({
       name: 'CADC Login',