diff --git a/Gemfile.lock b/Gemfile.lock
index 345e569..bd588cc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,7 +15,7 @@ GEM
     diff-lcs (1.3)
     numo-narray (0.9.1.3)
     porter2stemmer (1.0.1)
-    rake (10.4.2)
+    rake (13.0.3)
     rambling-trie (2.0.0)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
@@ -33,11 +33,12 @@ GEM
     tokenizer (0.3.0)
 
 PLATFORMS
+  ruby
   x86-mingw32
 
 DEPENDENCIES
   bundler (~> 1.17)
-  rake (~> 10.0)
+  rake (~> 13.0)
   rspec (~> 3.0)
   smalltext!
 
diff --git a/smalltext.gemspec b/smalltext.gemspec
index 2ca212b..6f5da5d 100644
--- a/smalltext.gemspec
+++ b/smalltext.gemspec
@@ -43,6 +43,6 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency 'porter2stemmer'
 
   spec.add_development_dependency "bundler", "~> 1.17"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 end