diff --git a/Gemfile.lock b/Gemfile.lock
index 84aa4a4..1be7621 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -160,7 +160,7 @@ GEM
       forwardable-extended (~> 2.6)
     power_assert (2.0.4)
     profile (0.4.0)
-    psych (5.1.2)
+    psych (5.2.0)
       stringio
     public_suffix (5.1.1)
     racc (1.7.1)
@@ -177,7 +177,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rdoc (6.5.1.1)
+    rdoc (6.7.0)
       psych (>= 4.0.0)
     recursive-open-struct (1.3.1)
       ostruct
@@ -235,7 +235,7 @@ GEM
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
     slack-notifier (2.4.0)
-    stringio (3.1.1)
+    stringio (3.1.2)
     swd (2.0.2)
       activesupport (>= 3)
       attr_required (>= 0.0.5)