diff --git a/Gemfile.lock b/Gemfile.lock
index f9a610f..7dee9ff 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -103,7 +103,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.0)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
@@ -146,7 +148,7 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.19.0, < 2.0)
-    rake (12.3.1)
+    rake (13.0.6)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
diff --git a/daksh.gemspec b/daksh.gemspec
index b438306..df38ec5 100644
--- a/daksh.gemspec
+++ b/daksh.gemspec
@@ -31,6 +31,6 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_development_dependency "bundler", "~> 1.15"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 end