diff --git a/temporalio/Gemfile.lock b/temporalio/Gemfile.lock
index 485cb6a6..1339142d 100644
--- a/temporalio/Gemfile.lock
+++ b/temporalio/Gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     temporalio (1.10.0)
       google-protobuf (>= 3.25.0)
-      json (< 3)
+      json (< 4)
       logger
 
 GEM
@@ -89,7 +89,7 @@ GEM
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
     jmespath (1.6.2)
-    json (2.21.2)
+    json (3.1.0)
     language_server-protocol (3.17.0.6)
     lint_roller (1.1.0)
     listen (3.10.0)
@@ -266,7 +266,7 @@ CHECKSUMS
   io-event (1.22.1) sha256=0dd054cefe4a29f1b8286604f332c14f3208d75f54902961e91e94d45e5e1600
   irb (1.17.0) sha256=168c4ddb93d8a361a045c41d92b2952c7a118fa73f23fe14e55609eb7a863aae
   jmespath (1.6.2) sha256=238d774a58723d6c090494c8879b5e9918c19485f7e840f2c1c7532cf84ebcb1
-  json (2.21.2) sha256=1f1d3b7cf2b3ba1a69beca0bb6db13d5438b80bff3cd54cdaaa620b9b07c1c6a
+  json (3.1.0) sha256=3ce7ccf8fde58960177a3a756c31f292a4c1e1dedee884547096a5b0604e3bd8
   language_server-protocol (3.17.0.6) sha256=5ef2c0c138f8267e1bc631d3328347d354f96724b0af22f2c79516120443b7f0
   lint_roller (1.1.0) sha256=2c0c845b632a7d172cb849cc90c1bce937a28c5c8ccccb50dfd46a485003cc87
   listen (3.10.0) sha256=c6e182db62143aeccc2e1960033bebe7445309c7272061979bb098d03760c9d2
diff --git a/temporalio/temporalio.gemspec b/temporalio/temporalio.gemspec
index 54c2160b..f22edb74 100644
--- a/temporalio/temporalio.gemspec
+++ b/temporalio/temporalio.gemspec
@@ -26,6 +26,6 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = '>= 3.3.0'
 
   spec.add_dependency 'google-protobuf', '>= 3.25.0'
-  spec.add_dependency 'json', '< 3'
+  spec.add_dependency 'json', '< 4'
   spec.add_dependency 'logger'
 end