diff --git a/Gemfile.lock b/Gemfile.lock
index 55490a17..7880481b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -492,7 +492,7 @@ GEM
     responders (3.1.1)
       actionpack (>= 5.2)
       railties (>= 5.2)
-    rexml (3.3.7)
+    rexml (3.3.9)
     rgl (0.6.3)
       pairing_heap (>= 0.3.0)
       rexml (~> 3.2, >= 3.2.4)