diff --git a/Gemfile.lock b/Gemfile.lock
index d74af7f..45bc2e4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -68,7 +68,7 @@ GEM
       rake (>= 0.8.7)
       rdoc (~> 3.4)
       thor (~> 0.14.4)
-    rake (0.9.2.2)
+    rake (13.0.1)
     rdoc (3.12)
       json (~> 1.4)
     rmagick (2.13.1)