diff --git a/Gemfile b/Gemfile
index 3dda175..07e069a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -17,4 +17,4 @@ group :jekyll_plugins do
   gem "jekyll-relative-links"
 end
 
-gem "rexml", "= 3.3.9"
+gem "rexml", "3.4.2"
diff --git a/Gemfile.lock b/Gemfile.lock
index 7912772..9ad5d4d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -140,7 +140,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.3.9)
+    rexml (3.4.2)
     rouge (3.26.0)
     ruby2_keywords (0.0.5)
     safe_yaml (1.0.5)
@@ -173,7 +173,7 @@ DEPENDENCIES
   jekyll-sitemap
   jemoji
   mdl
-  rexml (= 3.3.9)
+  rexml (= 3.4.2)
   tzinfo-data
 
 BUNDLED WITH