diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 2687b8e..3b7e6ac 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -14,12 +14,7 @@ jobs:
     - name: Set up cardano-wallet
       run: NODE_CONFIG_PATH=`pwd`/spec/testnet docker-compose -f docker-compose-shelley.yml up --detach
     - name: Set up Ruby
-    # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
-    # change this to (see https://github.com/ruby/setup-ruby#versioning):
-    # uses: ruby/setup-ruby@v1
-      uses: ruby/setup-ruby@ec106b438a1ff6ff109590de34ddc62c540232e0
-      with:
-        ruby-version: 2.6
+      uses: ruby/setup-ruby@v1
     - name: Install dependencies
       run: bundle install
     - name: Wait until node is synced
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index a1f9b0f..41917a9 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -23,12 +23,7 @@ jobs:
     - name: Set up cardano-wallet
       run: NODE_CONFIG_PATH=`pwd`/spec/testnet docker-compose -f docker-compose-shelley.yml up --detach
     - name: Set up Ruby
-    # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
-    # change this to (see https://github.com/ruby/setup-ruby#versioning):
-    # uses: ruby/setup-ruby@v1
-      uses: ruby/setup-ruby@ec106b438a1ff6ff109590de34ddc62c540232e0
-      with:
-        ruby-version: 2.6
+      uses: ruby/setup-ruby@v1
     - name: Install dependencies
       run: bundle install
     - name: Run all tests except nighlty
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..bff6ce5
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+ruby-2.7.1