diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index 551097b4..b4cd0325 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -391,7 +391,7 @@ GEM
     responders (3.1.1)
       actionpack (>= 5.2)
       railties (>= 5.2)
-    rexml (3.2.6)
+    rexml (3.3.9)
     rouge (4.2.1)
     rspec-core (3.13.0)
       rspec-support (~> 3.13.0)