diff --git a/Gemfile.lock b/Gemfile.lock
index cc60ebd..1817f5d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -440,7 +440,7 @@ GEM
       railties (>= 5.2)
     reverse_markdown (2.1.1)
       nokogiri
-    rexml (3.3.7)
+    rexml (3.3.9)
     rouge (4.4.0)
     rspec-core (3.13.1)
       rspec-support (~> 3.13.0)