diff --git a/Gemfile b/Gemfile
index b1bd2dc..9d51b42 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,7 +16,7 @@ gem "jekyll", "~> 3.8.0"
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
 gem "minima", "~> 2.5"
 
-gem "rexml", "~> 3.2.5"
+gem "rexml", "~> 3.3.9"
 
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
 # uncomment the line below. To upgrade, run `bundle update github-pages`.
diff --git a/Gemfile.lock b/Gemfile.lock
index 4ac84bd..c5f10a0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -218,7 +218,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.6)
+    rexml (3.3.9)
     rouge (3.19.0)
     ruby-enum (0.9.0)
       i18n
@@ -256,7 +256,7 @@ DEPENDENCIES
   jekyll (~> 3.8.0)
   jekyll-feed (~> 0.12)
   minima (~> 2.5)
-  rexml (~> 3.2.5)
+  rexml (~> 3.3.9)
   tzinfo (~> 1.2)
   tzinfo-data
   wdm (~> 0.1.1)