diff --git a/.gitmodules b/.gitmodules
index 1816e097..3c729ffa 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -555,3 +555,9 @@
 [submodule "vendor/grammars/liquid.tmbundle"]
 	path = vendor/grammars/liquid.tmbundle
 	url = https://github.com/bastilian/validcode-textmate-bundles
+[submodule "ats-mode-sublimetext"]
+	path = ats-mode-sublimetext
+	url = https://github.com/steinwaywhw/ats-mode-sublimetext
+[submodule "vendor/grammars/ats.sublime"]
+	path = vendor/grammars/ats.sublime
+	url = https://github.com/steinwaywhw/ats-mode-sublimetext
diff --git a/grammars.yml b/grammars.yml
index 9c9d7e35..e06ddde6 100644
--- a/grammars.yml
+++ b/grammars.yml
@@ -128,6 +128,8 @@ vendor/grammars/assembly.tmbundle:
 vendor/grammars/atom-salt:
 - source.python.salt
 - source.yaml.salt
+vendor/grammars/ats.sublime:
+- source.ats
 vendor/grammars/autoitv3-tmbundle:
 - source.autoit.3
 vendor/grammars/awk-sublime:
diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index f02c0c3c..050b9a26 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -82,10 +82,9 @@ ATS:
   - ats2
   extensions:
   - .dats
-  - .atxt
   - .hats
   - .sats
-  tm_scope: source.ocaml
+  tm_scope: source.ats
   ace_mode: ocaml
 
 ActionScript:
diff --git a/vendor/grammars/ats.sublime b/vendor/grammars/ats.sublime
new file mode 160000
index 00000000..64f1abc7
--- /dev/null
+++ b/vendor/grammars/ats.sublime
@@ -0,0 +1 @@
+Subproject commit 64f1abc71df139b1050ed68f2487dde7fe69829d