diff --git a/Gemfile b/Gemfile
index a57415c..6f0d40e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,5 +12,5 @@ end
 group :development do
   gem 'rdoc'
   gem "rspec", '~>2.14.0'
-  gem "rake", "< 11.0"
+  gem "rake", "< 13.0"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index e1be793..9b6d1cb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,7 +9,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     psych (4.0.6)
       stringio
-    rake (10.5.0)
+    rake (12.3.3)
     rdoc (6.4.0)
       psych (>= 4.0.0)
     rspec (2.14.1)
@@ -29,7 +29,7 @@ DEPENDENCIES
   curb (~> 0.9.10)
   htmlentities (>= 4.3.1)
   nokogiri (~> 1.9.1)
-  rake (< 11.0)
+  rake (< 13.0)
   rdoc
   rspec (~> 2.14.0)