diff --git a/Gemfile.lock b/Gemfile.lock
index 261bb14..5822216 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -191,7 +191,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.9.0)
+    loofah (2.18.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
@@ -213,9 +213,9 @@ GEM
     multipart-post (2.1.1)
     net-ldap (0.17.0)
     nio4r (2.5.8)
-    nokogiri (1.13.3-x86_64-darwin)
+    nokogiri (1.13.6-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.13.3-x86_64-linux)
+    nokogiri (1.13.6-x86_64-linux)
       racc (~> 1.4)
     oauth (0.5.6)
     oauth2 (1.4.7)
@@ -288,7 +288,7 @@ GEM
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.3.0)
+    rails-html-sanitizer (1.4.3)
       loofah (~> 2.3)
     rails-pry (0.0.1)
     rails_email_validator (0.1.4)