diff --git a/Gemfile b/Gemfile
index 863bd9d..6627ebd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,4 +11,4 @@ gem 'capistrano-rbenv', '~> 2.1.3'
 
 gem 'commonmarker', '~> 0.17.9'
 gem 'graphql-docs', '~> 1.4.0'
-gem 'sass', '~> 3.5.6'
+gem 'sass', '~> 3.7.3'
diff --git a/Gemfile.lock b/Gemfile.lock
index dc51af9..e96be6d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,7 +29,7 @@ GEM
     concurrent-ruby (1.0.5)
     extended-markdown-filter (0.6.0)
       html-pipeline (~> 2.0)
-    ffi (1.9.23)
+    ffi (1.10.0)
     gemoji (3.0.0)
     graphql (1.7.14)
     graphql-docs (1.4.0)
@@ -61,8 +61,8 @@ GEM
     rainbow (3.0.0)
     rake (12.3.1)
     rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
+    rb-inotify (0.10.0)
+      ffi (~> 1.0)
     rubocop (0.56.0)
       parallel (~> 1.10)
       parser (>= 2.5)
@@ -73,7 +73,7 @@ GEM
     ruby-enum (0.7.2)
       i18n
     ruby-progressbar (1.9.0)
-    sass (3.5.6)
+    sass (3.7.3)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -97,7 +97,7 @@ DEPENDENCIES
   graphql-docs (~> 1.4.0)
   pry (~> 0.11.3)
   rubocop (~> 0.56.0)
-  sass (~> 3.5.6)
+  sass (~> 3.7.3)
 
 BUNDLED WITH
    1.16.1