diff --git a/src/lib/seed.ts b/src/lib/seed.ts
index bc0f15b..1a2f239 100644
--- a/src/lib/seed.ts
+++ b/src/lib/seed.ts
@@ -4,7 +4,11 @@ import professorsData from './data/professors.json';
 import coursesData from './data/courses.json';
 
 const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL!;
-const supabaseServiceKey = process.env.SUPABASE_SERVICE_ROLE_KEY || process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!;
+const supabaseServiceKey = process.env.SUPABASE_SERVICE_ROLE_KEY;
+
+if (!supabaseUrl || !supabaseServiceKey) {
+  throw new Error('NEXT_PUBLIC_SUPABASE_URL and SUPABASE_SERVICE_ROLE_KEY must be set to run seed');
+}
 
 const supabase = createClient(supabaseUrl, supabaseServiceKey);