diff --git a/Gemfile.lock b/Gemfile.lock
index 71882f3..5369a59 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,7 +55,7 @@ GEM
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.0.3)
       loofah (~> 2.0)
-    rake (11.1.2)
+    rake (13.0.1)
     smart_properties (1.15.0)
     thread_safe (0.3.6)
     tzinfo (1.2.3)
diff --git a/better_html.gemspec b/better_html.gemspec
index 4ca5a24..734b4d7 100644
--- a/better_html.gemspec
+++ b/better_html.gemspec
@@ -26,5 +26,5 @@ Gem::Specification.new do |s|
   s.add_dependency 'smart_properties'
   s.add_dependency 'html_tokenizer', '~> 0.0.6'
 
-  s.add_development_dependency 'rake', '~> 0'
+  s.add_development_dependency 'rake', '~> 13'
 end