diff --git a/Gemfile.lock b/Gemfile.lock
index 131e1bd..b232155 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -84,7 +84,7 @@ GEM
       forwardable-extended (~> 2.6)
     public_suffix (4.0.6)
     racc (1.5.2)
-    rake (10.5.0)
+    rake (12.3.3)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -113,7 +113,7 @@ PLATFORMS
 DEPENDENCIES
   bundler
   jekyll-text-theme!
-  rake (~> 10.0)
+  rake (~> 12.3)
   tzinfo-data
   wdm (= 0.1.1)
   webrick (~> 1.7)
diff --git a/jekyll-text-theme.gemspec b/jekyll-text-theme.gemspec
index cc47579..2029133 100644
--- a/jekyll-text-theme.gemspec
+++ b/jekyll-text-theme.gemspec
@@ -23,5 +23,5 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency "jemoji", "~> 0.8"
 
   spec.add_development_dependency "bundler"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rake", "~> 12.3"
 end