diff --git a/supabase/functions/_shared/railway.ts b/supabase/functions/_shared/railway.ts
index dc87417..4429b27 100644
--- a/supabase/functions/_shared/railway.ts
+++ b/supabase/functions/_shared/railway.ts
@@ -168,7 +168,7 @@ export async function upsertRailwayVariableCollection(opts: {
       variableCollectionUpsert(input: $input)
     }
   `;
-  const input = {
+  const input: Record<string, unknown> = {
     projectId: opts.projectId,
     environmentId: opts.environmentId,
     serviceId: opts.serviceId,