diff --git a/archive/fall2019/Gemfile.lock b/archive/fall2019/Gemfile.lock
index 2b52ba9..735083a 100644
--- a/archive/fall2019/Gemfile.lock
+++ b/archive/fall2019/Gemfile.lock
@@ -249,7 +249,7 @@ GEM
     titlecase (0.1.1)
     typhoeus (1.3.1)
       ethon (>= 0.9.0)
-    tzinfo (1.2.6)
+    tzinfo (1.2.11)
       thread_safe (~> 0.1)
     unicode-display_width (1.7.0)
     zeitwerk (2.3.0)