diff --git a/.gitmodules b/.gitmodules
index 136013b2..134004a4 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -630,3 +630,6 @@
 [submodule "vendor/grammars/Lean.tmbundle"]
 	path = vendor/grammars/Lean.tmbundle
 	url = https://github.com/leanprover/Lean.tmbundle
+[submodule "vendor/grammars/ampl"]
+	path = vendor/grammars/ampl
+	url = https://github.com/ampl/sublime-ampl
diff --git a/grammars.yml b/grammars.yml
index 6d933a09..3b40a3b9 100644
--- a/grammars.yml
+++ b/grammars.yml
@@ -143,6 +143,8 @@ vendor/grammars/actionscript3-tmbundle:
 - text.xml.flex-config
 vendor/grammars/ada.tmbundle:
 - source.ada
+vendor/grammars/ampl:
+- source.ampl
 vendor/grammars/ant.tmbundle:
 - text.xml.ant
 vendor/grammars/antlr.tmbundle:
diff --git a/vendor/grammars/ampl b/vendor/grammars/ampl
new file mode 160000
index 00000000..2e399ebf
--- /dev/null
+++ b/vendor/grammars/ampl
@@ -0,0 +1 @@
+Subproject commit 2e399ebf4aec6b5b81f01d4cbee965f77852ce86