diff --git a/Gemfile b/Gemfile
index d36b368..3fad150 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ source 'https://rubygems.org'
 
 ruby '2.6.5'
 
-gem 'haml', '~> 5.2'
+gem 'haml', '~> 6.0'
 gem 'iso-639', '~> 0.3.5'
 gem 'json', '~> 2.6'
 gem 'mail', '~> 2.7'
diff --git a/Gemfile.lock b/Gemfile.lock
index 9879a17..ae39424 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,8 +15,9 @@ GEM
     fugit (1.7.1)
       et-orbi (~> 1, >= 1.2.7)
       raabro (~> 1.4)
-    haml (5.2.2)
-      temple (>= 0.8.0)
+    haml (6.0.5)
+      temple (>= 0.8.2)
+      thor
       tilt
     http-accept (1.7.0)
     http-cookie (1.0.3)
@@ -92,7 +93,8 @@ GEM
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    tilt (2.0.10)
+    thor (1.2.1)
+    tilt (2.0.11)
     timecop (0.9.5)
     tzinfo (2.0.5)
       concurrent-ruby (~> 1.0)
@@ -111,7 +113,7 @@ PLATFORMS
 
 DEPENDENCIES
   byebug (~> 11.1)
-  haml (~> 5.2)
+  haml (~> 6.0)
   iso-639 (~> 0.3.5)
   json (~> 2.6)
   mail (~> 2.7)
diff --git a/lib/autoheathen/email_processor.rb b/lib/autoheathen/email_processor.rb
index b82c299..325ee3e 100644
--- a/lib/autoheathen/email_processor.rb
+++ b/lib/autoheathen/email_processor.rb
@@ -158,12 +158,12 @@ def deliver_rts email, documents, mail_to
       cfg = @cfg # stoopid Mail scoping
       me = self # stoopid Mail scoping
       mail.text_part do
-        s = Haml::Engine.new( me.read_file cfg[:text_template] ).render(Object.new, to: mail_to, documents: documents, cfg: cfg)
+        s = Haml::Template.new { me.read_file cfg[:text_template] }.render(Object.new, to: mail_to, documents: documents, cfg: cfg)
         body s
       end
       mail.html_part do
         content_type 'text/html; charset=UTF-8'
-        s = Haml::Engine.new( me.read_file cfg[:html_template] ).render(Object.new, to: mail_to, documents: documents, cfg: cfg)
+        s = Haml::Template.new { me.read_file cfg[:html_template] }.render(Object.new, to: mail_to, documents: documents, cfg: cfg)
         body s
       end
       mail.delivery_method :smtp, address: @cfg[:mail_host], port: @cfg[:mail_port]