diff --git a/rails/blog/Gemfile.lock b/rails/blog/Gemfile.lock
index ce7f11d..3ab776a 100644
--- a/rails/blog/Gemfile.lock
+++ b/rails/blog/Gemfile.lock
@@ -61,6 +61,7 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
+    crass (1.0.6)
     erubi (1.6.1)
     execjs (2.7.0)
     ffi (1.9.18)
@@ -74,7 +75,8 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.0.3)
+    loofah (2.6.0)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.6)
       mime-types (>= 1.16, < 4)