diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 99687e0..58349cb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,9 +14,9 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - 3.1
-          - 3.0
-          - 2.7
+          - "3.1"
+          - "3.0"
+          - "2.7"
         gemfile:
           - Gemfile
           - test/gemfiles/no-rails.Gemfile
diff --git a/test/gemfiles/no-rails.Gemfile.lock b/test/gemfiles/no-rails.Gemfile.lock
index f5b13c6..69b4bb8 100644
--- a/test/gemfiles/no-rails.Gemfile.lock
+++ b/test/gemfiles/no-rails.Gemfile.lock
@@ -58,8 +58,10 @@ GEM
       rspec
     macaddr (1.7.2)
       systemu (~> 2.6.5)
+    mini_portile2 (2.8.0)
     multipart-post (2.1.1)
     nokogiri (1.13.3)
+      mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     nyan-cat-formatter (0.12.0)
       rspec (>= 2.99, >= 2.14.2, < 4)