diff --git a/backend/Dockerfile b/backend/Dockerfile
index 3c6d419..dfe0f42 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -15,5 +15,6 @@ COPY backend/. .
 
 ENV RAILS_ENV production
 ENV RUBY_YJIT_ENABLE 1
+EXPOSE 3000
 ENV CONSOLE_OUTPUT XTerm
 CMD ["bundle", "exec", "bash", "./start.sh"]
diff --git a/backend/Gemfile b/backend/Gemfile
index 44e9d5a..4877148 100644
--- a/backend/Gemfile
+++ b/backend/Gemfile
@@ -51,10 +51,9 @@ group :development do
   gem "rubocop-discourse", "~> 3.0", require: false
 
   gem "syntax_tree", "~> 5.1", require: false
-
-  gem "puma", "~> 6.3", require: false
 end
 
+gem "puma", "~> 6.3", require: false
 gem "falcon", "~> 0.42"
 
 gem "shortuuid", "~> 0.6.0"
diff --git a/backend/start.sh b/backend/start.sh
index 7fb29fc..3faa780 100644
--- a/backend/start.sh
+++ b/backend/start.sh
@@ -10,4 +10,4 @@ echo "Starting sidekiq"
 sidekiq &
 
 echo "Starting rails server"
-falcon serve --bind http://0.0.0.0:3000
+rails s -u puma -p 3000
diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index ed43fc6..9f4f65b 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -10,4 +10,5 @@ RUN npm install -g pnpm && pnpm install --frozen-lockfile
 
 COPY frontend/. .
 
+EXPOSE 3100
 CMD ["pnpm", "start"]
diff --git a/sub-chart/Dockerfile b/sub-chart/Dockerfile
index dfe8e83..7a7e4db 100644
--- a/sub-chart/Dockerfile
+++ b/sub-chart/Dockerfile
@@ -7,4 +7,5 @@ COPY sub-chart/package.json ./
 COPY sub-chart/dist ./dist
 
 ENV NODE_ENV production
+EXPOSE 3201
 CMD ["pnpm", "run", "start"]