diff --git a/Gemfile.lock b/Gemfile.lock
index dc91a17..8ff0fec 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -81,7 +81,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.1.3)
+    concurrent-ruby (1.1.4)
     contracts (0.16.0)
     crass (1.0.4)
     cucumber (3.1.2)
@@ -234,8 +234,8 @@ GEM
     raindrops (0.19.0)
     rake (12.3.2)
     rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
+    rb-inotify (0.10.0)
+      ffi (~> 1.0)
     ref (2.0.0)
     regexp_parser (1.3.0)
     responders (2.4.0)