diff --git a/beautiful-jekyll-theme.gemspec b/beautiful-jekyll-theme.gemspec
index 8ffd66238092..66f2c00a83f0 100644
--- a/beautiful-jekyll-theme.gemspec
+++ b/beautiful-jekyll-theme.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
     "documentation_uri" => "https://github.com/daattali/beautiful-jekyll#readme"
   }
 
-  spec.add_runtime_dependency "jekyll", "~> 3.8"
+  spec.add_runtime_dependency "jekyll", ">= 3.8", "< 5.0"
   spec.add_runtime_dependency "jekyll-paginate", "~> 1.1"
   spec.add_runtime_dependency "jekyll-sitemap", "~> 1.4"
   spec.add_runtime_dependency "kramdown-parser-gfm", "~> 1.1"