diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 27ca421af3..9351a1ab2c 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -412,7 +412,7 @@ jobs:
         ruby-version: '2.5.9'
     - name: Install Ruby dependencies
       run: |
-        gem install nokogiri:1.12.5 excon:0.109.0 fog-aws:1.3.0 json mime-types:3.1 rspec:3.5
+        gem install nokogiri:1.12.5 excon:0.109.0 fog-aws:1.3.0 json:2.7.6 mime-types:3.1 rspec:3.5
     - name: Install Java dependencies
       run: |
         sudo apt-get update && sudo apt-get install -y --fix-missing default-jdk maven