diff --git a/spec/tester_mongo/Gemfile.lock b/spec/tester_mongo/Gemfile.lock
index c52736f2..ab478517 100644
--- a/spec/tester_mongo/Gemfile.lock
+++ b/spec/tester_mongo/Gemfile.lock
@@ -138,7 +138,7 @@ GEM
       sprockets (>= 3.0.0)
     thor (0.20.3)
     thread_safe (0.3.6)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     websocket-driver (0.6.5)
       websocket-extensions (>= 0.1.0)