diff --git a/apps/editor/instrumentation.ts b/apps/editor/instrumentation.ts
index 47f2b8cf..a5d0ddca 100644
--- a/apps/editor/instrumentation.ts
+++ b/apps/editor/instrumentation.ts
@@ -10,9 +10,9 @@ export async function register() {
     const supabase = createClient(url, key)
 
     const { data: buckets } = await supabase.storage.listBuckets()
-    const exists = buckets?.some((b) => b.name === 'avatars')
+    const bucketNames = new Set(buckets?.map((b) => b.name))
 
-    if (!exists) {
+    if (!bucketNames.has('avatars')) {
       await supabase.storage.createBucket('avatars', {
         public: true,
         fileSizeLimit: 5 * 1024 * 1024, // 5MB
@@ -20,5 +20,14 @@ export async function register() {
       })
       console.log('Created "avatars" storage bucket')
     }
+
+    if (!bucketNames.has('project-thumbnails')) {
+      await supabase.storage.createBucket('project-thumbnails', {
+        public: true,
+        fileSizeLimit: 10 * 1024 * 1024, // 10MB (matches uploadProjectThumbnail validation)
+        allowedMimeTypes: ['image/png'],
+      })
+      console.log('Created "project-thumbnails" storage bucket')
+    }
   }
 }