diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f8c63f4..e9f6b58 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,6 +11,7 @@ jobs:
     strategy:
         matrix:
           ruby: [
+            '2.7.8',
             '3.0.6',
             '3.1.4',
             '3.2.3',
diff --git a/Gemfile.lock b/Gemfile.lock
index cf398c3..53ad196 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    atco (1.0.0)
+    atco (1.0.1)
 
 GEM
   remote: https://rubygems.org/
@@ -58,9 +58,6 @@ PLATFORMS
 
 DEPENDENCIES
   atco!
-  rake
-  rspec
+  rake (~> 13.0)
+  rspec (~> 3.9)
   rubocop
-
-BUNDLED WITH
-   2.5.3