diff --git a/github_changelog_generator.gemspec b/github_changelog_generator.gemspec
index a621547..617e47b 100644
--- a/github_changelog_generator.gemspec
+++ b/github_changelog_generator.gemspec
@@ -30,4 +30,5 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency("faraday-http-cache")
   spec.add_runtime_dependency("activesupport")
   spec.add_runtime_dependency("retriable", ["~> 2.1"])
+  spec.add_runtime_dependency("multi_json")
 end