diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5cd5a75..bb5d037 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -6,35 +6,36 @@ jobs:
   build:
     runs-on: ubuntu-latest
 
+    container:
+      image: ruby:2.6.5
+
     services:
       postgres:
         image: postgres:12
-        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
         ports:
           - 5432:5432
+        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
 
     steps:
     - uses: actions/checkout@v1
 
-    - name: Set up Ruby
-      uses: actions/setup-ruby@v1
-      with:
-        ruby-version: 2.6.3
-
     - name: Set up reporter
       run: |
         curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter
         chmod +x ./cc-test-reporter
         ./cc-test-reporter before-build
 
-    - name: Run tests
+    - name: Install dependencies
       run: |
-        sudo apt-get install libpq-dev
+        apt-get -yqq install libpq-dev
         gem install bundler
         bundle install --jobs 4 --retry 3
-        bundle exec rake
+
+    - name: Run tests
+      run: bundle exec rake
       env:
-        DATABASE_URL: postgres://postgres@localhost/postgres
+        APP_ENV: test
+        DATABASE_URL: postgres://postgres@postgres/postgres
 
     - name: Publish image
       uses: elgohr/Publish-Docker-Github-Action@master
diff --git a/.ruby-version b/.ruby-version
index ec1cf33..57cf282 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.6.3
+2.6.5
diff --git a/Dockerfile b/Dockerfile
index d30df73..5361869 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.6.3
+FROM ruby:2.6.5
 
 RUN mkdir /app
 WORKDIR /app
diff --git a/Gemfile b/Gemfile
index cf50be3..8390435 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@
 
 source 'http://rubygems.org'
 
-ruby '2.6.3'
+ruby '2.6.5'
 
 gem 'money'
 gem 'oj'
diff --git a/Gemfile.lock b/Gemfile.lock
index ac23ac5..d40ea9e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -120,7 +120,7 @@ DEPENDENCIES
   webmock
 
 RUBY VERSION
-   ruby 2.6.3p62
+   ruby 2.6.5p114
 
 BUNDLED WITH
    2.0.2