diff --git a/signup/Dockerfile b/signup/Dockerfile
index a483812..5244edb 100644
--- a/signup/Dockerfile
+++ b/signup/Dockerfile
@@ -1,6 +1,6 @@
 FROM ghcr.io/gleam-lang/gleam:v1.16.0-erlang-alpine AS builder
 WORKDIR /build
-COPY gleam.toml ./
+COPY gleam.toml manifest.toml ./
 RUN gleam deps download
 COPY src ./src
 RUN gleam export erlang-shipment