diff --git a/plugins/google-analytics.rb b/plugins/google-analytics.rb
index ca06a5e2..b2cb3367 100644
--- a/plugins/google-analytics.rb
+++ b/plugins/google-analytics.rb
@@ -2,7 +2,7 @@
 # This file is part of WhatWeb and may be subject to
 # redistribution and commercial restrictions. Please see the WhatWeb
 # web site for more information on licensing and terms of use.
-# https://morningstarsecurity.com/research/whatweb
+# https://www.morningstarsecurity.com/research/whatweb
 ##
 Plugin.define do
 name "Google-Analytics"
@@ -24,7 +24,12 @@ matches [
 	# New Google Universal Analytics
 	# String : ga('create', 'UA-12345678-1', 'example.com');
 	# String : ga('create', 'UA-1234567-12', 'example.com');
-	{ :version=>"Universal", :account=>/ga\([\s]*'create',[\s]*'(\w{2}-\d{1,}-\d{1,})',/}
+	{ :version=>"Universal", :account=>/ga\([\s]*'create',[\s]*'(\w{2}-\d{1,}-\d{1,})',/},
+
+	# Added by ippolito 2021-10-19
+	{ :regexp=>/[^a-zA-Z\d_\-\.](gtag\.js|analytics\.js)/, :version=>"Universal"},
+	{ :regexp=>/[^a-zA-Z\d_\-\.]ga\.js/, :version=>"Classic"},
+	{ :account=>/<script .*src="https:\/\/www.googletagmanager.com\/gtag\/js?.*id=(\w{2}-\w{1,}-\d{1,})"/}
 ]
 
 end
diff --git a/plugins/google-tag-manager.rb b/plugins/google-tag-manager.rb
new file mode 100644
index 00000000..14053a2c
--- /dev/null
+++ b/plugins/google-tag-manager.rb
@@ -0,0 +1,27 @@
+##
+# This file is part of WhatWeb and may be subject to
+# redistribution and commercial restrictions. Please see the WhatWeb
+# web site for more information on licensing and terms of use.
+# https://www.morningstarsecurity.com/research/whatweb
+##
+Plugin.define do
+name "Google-Tag-Manager"
+authors [
+  "Michael Ippolito"
+]
+version "0.1"
+description "This plugin identifies Google Tag Manager."
+website "http://www.google.com/tagmanager/"
+
+# Matches #
+matches [
+
+	# Added by ippolito 2021-10-19
+	{ :regexp=>/[^a-zA-Z\d_\-\.]gtag\.js/, :account=>/<script .*src="https:\/\/www.googletagmanager.com\/gtag\/js?.*id=(\w{2}-\w{1,}-\d{1,})"/},
+	{ :regexp=>/<!-- Google Tag Manager -->/},
+	{ :regexp=>/https:\/\/www\.googletagmanager\.com\/gtm\.js/}
+
+]
+
+end
+