diff --git a/Dockerfile b/Dockerfile
index f93dedd..4675fd4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,7 +25,7 @@ RUN apk update \
   && bundle config build.nokogiri --use-system-libraries \
   && bundle config git.allow_insecure true \
   && gem update --system 3.5.23 \
-  && gem install json -v "~>2.8" \
+  && gem install json -v "~>2.9" \
   && gem install bigdecimal -v "~>3.1" \
   && gem install racc -v "~>1.8" \
   && gem uninstall rubygems-update \
diff --git a/Gemfile.lock b/Gemfile.lock
index d2a1d0f..db0a8a1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -20,7 +20,7 @@ PATH
   specs:
     pact-cli (1.4.0)
       bigdecimal (~> 3.1)
-      json (~> 2.8)
+      json (~> 2.9)
       pact-mock_service
       pact-provider-verifier
       pact_broker-client (~> 1.28)
diff --git a/pact-cli.gemspec b/pact-cli.gemspec
index 60a632c..88051fb 100644
--- a/pact-cli.gemspec
+++ b/pact-cli.gemspec
@@ -44,7 +44,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency "pact-mock_service"
   spec.add_dependency "pact-provider-verifier"
   spec.add_dependency "pact_broker-client", "~> 1.28"
-  spec.add_dependency "json", "~>2.8" # must match native lib install in the Dockerfile
+  spec.add_dependency "json", "~>2.9" # must match native lib install in the Dockerfile
   spec.add_dependency "bigdecimal", "~>3.1" # must match native lib install in the Dockerfile
 
   spec.add_dependency "rack-test", ">= 0.6.3", "< 3.0.0"