diff --git a/hologram.gemspec b/hologram.gemspec
index 0f973d4..9ca866b 100644
--- a/hologram.gemspec
+++ b/hologram.gemspec
@@ -14,7 +14,7 @@ Gem::Specification.new do |spec|
   spec.license       = "MIT"
 
   spec.add_dependency "redcarpet", ">= 2.2", "< 4.0"
-  spec.add_dependency "rouge", ">= 1.5"
+  spec.add_dependency "rouge", ">= 1.5", "!= 1.9.1"
 
   spec.files         = `git ls-files`.split($/)
   spec.executables   = ['hologram']