diff --git a/clojure-book/Gemfile.lock b/clojure-book/Gemfile.lock
index 61c32a1..6fdc7f4 100644
--- a/clojure-book/Gemfile.lock
+++ b/clojure-book/Gemfile.lock
@@ -67,7 +67,7 @@ GEM
     rb-fsevent (0.9.5)
     rb-inotify (0.9.5)
       ffi (>= 0.5.0)
-    redcarpet (3.3.1)
+    redcarpet (3.5.1)
     rouge (1.9.0)
     rubyzip (1.1.7)
     sass (3.4.14)