diff --git a/.dockerignore b/.dockerignore
index 65e80a00..5bf783e2 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -26,9 +26,9 @@ vendor
 .eslintrc.json
 .gitattributes
 .gitignore
+.prettierignore
 .rspec
 .rubocop.yml
-.tool-versions
 cypress.config.ts
 fly*.toml
 karma*.js
diff --git a/Dockerfile b/Dockerfile
index 13f97d91..95c9ab80 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -38,7 +38,9 @@ RUN apk add --no-cache \
 WORKDIR /build
 ENV RACK_ENV=production
 
-COPY --link Gemfile* ./
+COPY --link
+	.tool-versions \
+	Gemfile* ./
 
 RUN --mount=type=cache,id=loot-bundler,target=tmp/vendor/bundle \
 	bundle config set --local without development:test; \
@@ -75,6 +77,7 @@ RUN \
 RUN mkdir -p tmp/pids
 
 COPY --link --chown=loot \
+	.tool-versions \
 	config.ru \
 	docker-entrypoint \
 	Gemfile* \