diff --git a/github-pages-health-check.gemspec b/github-pages-health-check.gemspec
index 87ad564..c91c366 100644
--- a/github-pages-health-check.gemspec
+++ b/github-pages-health-check.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency("addressable", "~> 2.3")
   s.add_dependency("dnsruby", "~> 1.60")
-  s.add_dependency("octokit", "~> 4.0")
+  s.add_dependency("octokit", ">= 4", "< 7")
   s.add_dependency("public_suffix", ">= 3.0", "< 5.0")
   s.add_dependency("typhoeus", "~> 1.3")
 end