diff --git a/W3C/wai-dynamic-planning/Gemfile.lock b/W3C/wai-dynamic-planning/Gemfile.lock
index 6f35982ac..1fbe976f1 100644
--- a/W3C/wai-dynamic-planning/Gemfile.lock
+++ b/W3C/wai-dynamic-planning/Gemfile.lock
@@ -128,11 +128,11 @@ GEM
       sprockets (~> 2.0)
       tilt (~> 1.1)
     thor (0.19.1)
-    thread_safe (0.3.5)
+    thread_safe (0.3.6)
     tilt (1.4.1)
     timers (4.0.4)
       hitimes
-    tzinfo (1.2.2)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uber (0.0.15)
     uglifier (2.7.2)