diff --git a/Gemfile.lock b/Gemfile.lock
index 610570f..5d343f3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -68,6 +68,7 @@ GEM
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
     connection_pool (2.2.1)
+    crass (1.0.6)
     diff-lcs (1.3)
     erubi (1.6.0)
     execjs (2.7.0)
@@ -83,7 +84,8 @@ GEM
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (1.8.6)
-    loofah (2.0.3)
+    loofah (2.19.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.6)
       mime-types (>= 1.16, < 4)
@@ -91,13 +93,15 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini_portile2 (2.2.0)
+    mini_portile2 (2.6.1)
     minitest (5.10.2)
     multi_json (1.12.1)
     nio4r (2.1.0)
-    nokogiri (1.8.0)
-      mini_portile2 (~> 2.2.0)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
     public_suffix (2.0.5)
+    racc (1.6.1)
     rack (2.0.3)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -116,8 +120,8 @@ GEM
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.4.4)
+      loofah (~> 2.19, >= 2.19.1)
     railties (5.1.1)
       actionpack (= 5.1.1)
       activesupport (= 5.1.1)