diff --git a/Gemfile b/Gemfile
index 9e66e73..5568b16 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,7 +23,7 @@ source 'https://rubygems.org'
 
 gem 'eslintrb', '2.1.0'
 gem 'glogin', '0.13.0'
-gem 'haml', '5.0.4'
+gem 'haml', '5.2.2'
 gem 'iri', '0.7.0'
 gem 'loog', '0.3.1'
 gem 'minitest', '5.18.1', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 4f9074d..0907449 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -75,7 +75,7 @@ GEM
     glogin (0.13.0)
       base58 (>= 0.2)
       openssl (>= 2.0)
-    haml (5.0.4)
+    haml (5.2.2)
       temple (>= 0.8.0)
       tilt
     i18n (1.14.1)
@@ -257,7 +257,7 @@ PLATFORMS
 DEPENDENCIES
   eslintrb (= 2.1.0)
   glogin (= 0.13.0)
-  haml (= 5.0.4)
+  haml (= 5.2.2)
   iri (= 0.7.0)
   loog (= 0.3.1)
   minitest (= 5.18.1)