diff --git a/.dockerignore b/.dockerignore
index 53311b9..ebf4fcb 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -19,9 +19,9 @@ vendor
 .eslintignore
 .eslintrc.json
 .gitignore
+.prettierignore
 .rspec
 .rubocop.yml
-.tool-versions
 cypress.config.ts
 fly*.toml
 karma*.js
diff --git a/Dockerfile b/Dockerfile
index ded6814..f44ee38 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -36,7 +36,9 @@ RUN apk add --no-cache build-base
 WORKDIR /build
 ENV RACK_ENV=production
 
-COPY --link Gemfile* ./
+COPY --link \
+	.tool-versions \
+	Gemfile* ./
 
 RUN --mount=type=cache,id=tvmanager-bundler,target=tmp/vendor/bundle \
 	bundle config set --local without development:test; \
@@ -60,6 +62,7 @@ RUN \
 	bundle config set --local deployment true;
 
 COPY --link --chown=tvmanager \
+	.tool-versions \
 	config.ru \
 	Gemfile* \
 	Rakefile ./