diff --git a/pkgs/tools/misc/fluentd/Gemfile.lock b/pkgs/tools/misc/fluentd/Gemfile.lock
index 4f51d365513a8..014cc70e39243 100644
--- a/pkgs/tools/misc/fluentd/Gemfile.lock
+++ b/pkgs/tools/misc/fluentd/Gemfile.lock
@@ -1,6 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    concurrent-ruby (1.1.10)
     cool.io (1.3.0)
     elasticsearch (1.0.8)
       elasticsearch-api (= 1.0.7)
@@ -36,9 +37,8 @@ GEM
     patron (0.4.20)
     sigdump (0.2.2)
     string-scrub (0.0.5)
-    thread_safe (0.3.5)
-    tzinfo (1.2.2)
-      thread_safe (~> 0.1)
+    tzinfo (2.0.5)
+      concurrent-ruby (~> 1.0)
     tzinfo-data (1.2015.1)
       tzinfo (>= 1.0.0)
     yajl-ruby (1.2.1)