diff --git a/Gemfile.lock b/Gemfile.lock
index 8044847..9083928 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -164,7 +164,7 @@ GEM
     loofah (2.2.2)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    lumberjack (1.0.12)
+    lumberjack (1.0.13)
     mail (2.7.0)
       mini_mime (>= 0.1.1)
     method_source (0.9.0)