ztk.gemspec in ztk-2.4.1 vs ztk.gemspec in ztk-2.4.2

- old
+ new

@@ -47,10 +47,10 @@
 
   spec.add_development_dependency("pry")
   spec.add_development_dependency("rake")
   spec.add_development_dependency("rspec")
   spec.add_development_dependency("yard")
-  spec.add_development_dependency("redcarpet")
+  spec.add_development_dependency("redcarpet", "< 3.0.0")
   spec.add_development_dependency("coveralls")
   spec.add_development_dependency("yarjuf")
   spec.add_development_dependency("simplecov-rcov")
 
   spec.add_development_dependency("travis")