diff --git a/Gemfile.lock b/Gemfile.lock
index 810b961..6631e92 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -74,6 +74,7 @@ GEM
     coffee-script-source (1.12.2)
     colorize (0.8.1)
     concurrent-ruby (1.0.5)
+    crass (1.0.6)
     delayed_job (4.1.2)
       activesupport (>= 3.0, < 5.1)
     delayed_job_active_record (4.1.1)
@@ -248,7 +249,8 @@ GEM
     kaminari (0.17.0)
       actionpack (>= 3.0.0)
       activesupport (>= 3.0.0)
-    loofah (2.0.3)
+    loofah (2.19.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     macaddr (1.7.1)
       systemu (~> 2.6.2)
@@ -287,8 +289,8 @@ GEM
       activesupport (>= 4.2.0.beta, < 5.0)
       nokogiri (~> 1.6)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.4.4)
+      loofah (~> 2.19, >= 2.19.1)
     rails_12factor (0.0.3)
       rails_serve_static_assets
       rails_stdout_logging