diff --git a/Gemfile.lock b/Gemfile.lock
index 89e7994..72ad4d9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     coderay (1.1.3)
     csv (3.3.6)
-    io-console (0.8.2)
+    io-console (0.9.2)
     method_source (1.1.0)
     mini_portile2 (2.8.9)
     nkf (0.3.0)