diff --git a/configcat.gemspec b/configcat.gemspec
index 1e173bd..0832e91 100644
--- a/configcat.gemspec
+++ b/configcat.gemspec
@@ -26,8 +26,10 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "codecov", "~> 0.5"
   if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.5')
     spec.add_development_dependency "webmock", "~> 3.18"
-  else
+  elsif Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.6')
     spec.add_development_dependency "webmock", "~> 3.25"
+  else
+    spec.add_development_dependency "webmock", "~> 3.26"
   end
   spec.add_development_dependency "rubocop"
 end