diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index ee4dc32..51e0689 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: ['2.5', '2.7', '3.2', '3.3', '3.4']
+        ruby-version: ['2.7', '3.2', '3.3', '3.4']
 
     steps:
     - uses: actions/checkout@v6
diff --git a/cf-uaac.gemspec b/cf-uaac.gemspec
index cd53837..d1c2b31 100644
--- a/cf-uaac.gemspec
+++ b/cf-uaac.gemspec
@@ -42,6 +42,6 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'eventmachine', '~> 1.2'
   s.add_runtime_dependency 'launchy', '>= 2.5', '< 4.0'
   s.add_runtime_dependency 'em-http-request', '~> 1.1', '>= 1.1.2'
-  s.add_runtime_dependency 'json', '~>2.7'
+  s.add_runtime_dependency 'json', '~> 2.19', '>= 2.19.3'
   s.add_runtime_dependency 'rack', '~> 3.2', '>= 3.2.5'
 end