diff --git a/Gemfile.lock b/Gemfile.lock
index 56057dc..7177f2d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -41,24 +41,24 @@ GEM
       railties (>= 3.0.0)
       thor (>= 0.14.6)
     concurrent-ruby (1.0.2)
+    crass (1.0.6)
     diff-lcs (1.2.5)
     erubis (2.7.0)
     fasterer (0.3.2)
       colorize (~> 0.7)
       ruby_parser (~> 3.7)
     i18n (0.7.0)
-    loofah (2.0.3)
+    loofah (2.19.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     method_source (0.8.2)
     mini_portile2 (2.1.0)
     minitest (5.9.1)
-    nokogiri (1.6.8)
+    nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
     parallel (1.12.0)
     parser (2.4.0.0)
       ast (~> 2.2)
-    pkg-config (1.1.7)
     powerpack (0.1.1)
     pry (0.10.3)
       coderay (~> 1.1.0)
@@ -73,8 +73,8 @@ GEM
     rails-dom-testing (2.0.1)
       activesupport (>= 4.2.0, < 6.0)
       nokogiri (~> 1.6.0)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.4.4)
+      loofah (~> 2.19, >= 2.19.1)
     railties (5.0.0.1)
       actionpack (= 5.0.0.1)
       activesupport (= 5.0.0.1)