diff --git a/sql/associations_exercise/Gemfile.lock b/sql/associations_exercise/Gemfile.lock
index 5220ce9..668e942 100644
--- a/sql/associations_exercise/Gemfile.lock
+++ b/sql/associations_exercise/Gemfile.lock
@@ -173,7 +173,7 @@ GEM
     thor (1.0.1)
     thread_safe (0.3.6)
     tilt (2.0.10)
-    tzinfo (1.2.6)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)