diff --git a/Gemfile.lock b/Gemfile.lock
index a1fc784..7274b2f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,7 +43,7 @@ GEM
       rack (>= 0.4)
     rack-test (0.6.3)
       rack (>= 1.0)
-    rake (10.5.0)
+    rake (13.0.1)
     sprockets (2.1.4)
       hike (~> 1.2)
       rack (~> 1.0)
@@ -61,7 +61,7 @@ DEPENDENCIES
   bundler (~> 1.16)
   form_obj!
   minitest (~> 5.0)
-  rake (~> 10.0)
+  rake (~> 13.0)
 
 BUNDLED WITH
    1.17.3
diff --git a/form_obj.gemspec b/form_obj.gemspec
index d8a9eba..cf959d9 100644
--- a/form_obj.gemspec
+++ b/form_obj.gemspec
@@ -38,7 +38,7 @@ well as serialized to a hash which reflects a model. ActiveModel::Errors could b
   spec.add_dependency "activesupport", ">= 3.2"
 
   spec.add_development_dependency "bundler", "~> 1.16"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "minitest", "~> 5.0"
   spec.add_development_dependency "actionpack", ">= 3.2"
   spec.add_development_dependency "appraisal"