diff --git a/jekyll-auth.gemspec b/jekyll-auth.gemspec
index a02e640..3bcd242 100644
--- a/jekyll-auth.gemspec
+++ b/jekyll-auth.gemspec
@@ -34,5 +34,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency "rubocop", "~> 0.49", ">= 0.49.0"
   s.add_development_dependency "rubocop-jekyll", "~> 0.11.0"
   s.add_development_dependency "rubocop-performance", "~> 1.0"
-  s.add_development_dependency "webmock", "~> 2.3 "
+  s.add_development_dependency "webmock", "~> 3.17"
 end