diff --git a/Dockerfile b/Dockerfile
index f4c2fe0..07e9aa6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -28,7 +28,7 @@ RUN apk update \
   && bundle config build.nokogiri --use-system-libraries \
   && bundle config git.allow_insecure true \
   && gem update --system 3.6.9 \
-  && gem install json -v "~>2.15" \
+  && gem install json -v "~>2.18" \
   && gem install bigdecimal -v "~>3.2" \
   && gem install racc -v "~>1.8" \
   && gem uninstall rubygems-update \
diff --git a/Gemfile.lock b/Gemfile.lock
index 33b0ab7..a8d5ae2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,7 +42,7 @@ GEM
       csv
       mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
-    json (2.15.2)
+    json (2.18.0)
     jsonpath (1.1.5)
       multi_json
     logger (1.7.0)
diff --git a/pact-cli.gemspec b/pact-cli.gemspec
index 249087a..bdfba66 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", "~>2.15" # must match native lib install in the Dockerfile
+  spec.add_dependency "json", "~>2.18" # must match native lib install in the Dockerfile
   spec.add_dependency "bigdecimal", "~>3.2" # must match native lib install in the Dockerfile
 
   spec.add_dependency "rack-test", ">= 0.6.3", "< 3.0.0"