diff --git a/sql/associations_exercise/Gemfile.lock b/sql/associations_exercise/Gemfile.lock
index cad7607..94e61e1 100644
--- a/sql/associations_exercise/Gemfile.lock
+++ b/sql/associations_exercise/Gemfile.lock
@@ -112,7 +112,7 @@ GEM
       pry (>= 0.10.4)
     public_suffix (4.0.3)
     puma (3.12.2)
-    rack (2.1.2)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.1)