diff --git a/Gemfile.lock b/Gemfile.lock
index 43dad147..ed714775 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -170,7 +170,8 @@ GEM
     public_suffix (6.0.1)
     racc (1.8.1)
     rack (3.2.1)
-    rack-session (2.0.0)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
       rack (>= 3.0.0)
     rack-test (2.1.0)
       rack (>= 1.3)