diff --git a/stack_master.gemspec b/stack_master.gemspec
index e43282e5..3998f60c 100644
--- a/stack_master.gemspec
+++ b/stack_master.gemspec
@@ -56,5 +56,5 @@ Gem::Specification.new do |spec|
   spec.add_dependency "hashdiff", "~> 1"
   spec.add_dependency "ejson_wrapper"
   spec.add_dependency "diff-lcs"
-  spec.add_dependency "cfn-nag", ">= 0.6.7", "< 0.8.0"
+  spec.add_dependency "cfn-nag", ">= 0.6.7", "< 0.9.0"
 end