diff --git a/Gemfile.lock b/Gemfile.lock
index b687b90..71217d0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,7 +38,7 @@ GEM
     listen (3.8.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    lumberjack (1.2.8)
+    lumberjack (1.2.9)
     method_source (1.0.0)
     mini_portile2 (2.8.2)
     nenv (0.3.0)