diff --git a/Gemfile.lock b/Gemfile.lock
index 7e05eb95..c5237542 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -137,7 +137,7 @@ GEM
       ast (~> 2.4.0)
     pg (1.2.3)
     racc (1.6.0)
-    rack (2.2.3)
+    rack (2.2.3.1)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.3)