diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2a38bde..ccdbab3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 4.0.3
+
+Limit json dependency to < 2.11 to avoid potential breaking changes in json gem 2.11.0
+
 ## 4.0.2
 
 Make overwritten Authorization header possible again.
diff --git a/lib/quickpay/api/version.rb b/lib/quickpay/api/version.rb
index 4f66171..e7ca6ef 100644
--- a/lib/quickpay/api/version.rb
+++ b/lib/quickpay/api/version.rb
@@ -1,5 +1,5 @@
 module QuickPay
   module API
-    VERSION = "4.0.2".freeze
+    VERSION = "4.0.3".freeze
   end
 end
diff --git a/quickpay-ruby-client.gemspec b/quickpay-ruby-client.gemspec
index c425b9f..1fb11f2 100644
--- a/quickpay-ruby-client.gemspec
+++ b/quickpay-ruby-client.gemspec
@@ -19,5 +19,6 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "json", "~> 2", ">= 2.5"
+  # Allow 2.0 through 2.10.X to avoid breaking changes in 2.11.0
+  spec.add_dependency "json", "~> 2.0", "< 2.11"
 end