diff --git a/Gemfile b/Gemfile
index 5f945da99..252c87aa7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,7 +13,7 @@ gem "roadie-rails", "~> 1.2.1"
 gem "roadie", "~> 3.2.1"
 gem "mimemagic"
 
-gem "nokogiri", "~> 1.8.0"
+gem "nokogiri", "~> 1.8.4"
 gem "i18n", "~> 0.9.1"
 
 # Request at least rails-html-sanitizer 1.0.3 because of security advisories
diff --git a/Gemfile.lock b/Gemfile.lock
index f7f9d7136..b24372eb7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -89,7 +89,7 @@ GEM
       metaclass (~> 0.0.1)
     net-ldap (0.16.0)
     nio4r (2.1.0)
-    nokogiri (1.8.1)
+    nokogiri (1.8.4)
       mini_portile2 (~> 2.3.0)
     platform_sh (0.2.7)
     platform_sh_rails (0.1.7)
@@ -185,7 +185,7 @@ DEPENDENCIES
   mimemagic
   mocha
   net-ldap (~> 0.16.0)
-  nokogiri (~> 1.8.0)
+  nokogiri (~> 1.8.4)
   platform_sh_rails (= 0.1.7)
   puma (~> 3.11)
   rack-openid