diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2a8135b..b6baa4e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -3,6 +3,7 @@ on:
   push:
     paths:
       - '.github/workflows/tests.yml'
+      - 'Dockerfile'
       - 'src/utils.rs'
       - 'res/*_test.txt'
   workflow_dispatch:
diff --git a/Dockerfile b/Dockerfile
index 9f44bd6..1dee113 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 FROM --platform=linux/i386 alpine:3.19
-RUN apk add cargo
+RUN apk add cargo rustup
 RUN rustup update
 WORKDIR /project-euler
 COPY . .