diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index 1c7f4f6..dab97cd 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -1,4 +1,5 @@
 # ---------- wasm-builder ----------
+# Cache bust: Force WASM rebuild with cargo registry fix
 FROM docker.io/rust:1.90-slim AS wasm-builder
 WORKDIR /app