diff --git a/code/go.mod b/code/go.mod
index 4dbb5ae..34bd279 100644
--- a/code/go.mod
+++ b/code/go.mod
@@ -1,4 +1,5 @@
 module darjeeling.systemec.nl/rhouben/fibonacci
+replace darjeeling.systemec.nl/rhouben/fibonacci/functions => ./functions
 
 go 1.24.4
 
diff --git a/docker/Dockerfile b/docker/Dockerfile
index c80a832..28069c9 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,15 +1,14 @@
-FROM golang:1.23-bookworm AS base
+FROM golang:1.24-bookworm AS base
 
 # /build is the working directory
 WORKDIR /build
 
 # Copy control files and pull in dependencies
-COPY code/go.mod .
-RUN go mod download
+COPY code/ ./
+RUN go mod tidy \
+  && go mod download
 
 ENV port=8089
-# Copy the rest of the source code into the container
-COPY code/* .
 
 # Build the app