diff --git a/.gitmodules b/.gitmodules
index d1c4643c51..7e22d7ba2e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1281,6 +1281,9 @@
 [submodule "vendor/grammars/vscode-curry"]
 	path = vendor/grammars/vscode-curry
 	url = https://github.com/fwcd/vscode-curry
+[submodule "vendor/grammars/vscode-dune"]
+	path = vendor/grammars/vscode-dune
+	url = https://github.com/maelvls/vscode-dune.git
 [submodule "vendor/grammars/vscode-euphoria"]
 	path = vendor/grammars/vscode-euphoria
 	url = https://github.com/OpenEuphoria/vscode-euphoria
diff --git a/grammars.yml b/grammars.yml
index c25205ca81..e36a9a50dc 100644
--- a/grammars.yml
+++ b/grammars.yml
@@ -1143,6 +1143,8 @@ vendor/grammars/vscode-curry:
 - markdown.curry.codeblock
 - source.curry
 - source.icurry
+vendor/grammars/vscode-dune:
+- source.dune
 vendor/grammars/vscode-euphoria:
 - source.euphoria
 vendor/grammars/vscode-fluent:
diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 32c3a9f8ed..7b96e2ceb6 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1669,6 +1669,14 @@ Dotenv:
   tm_scope: source.dotenv
   ace_mode: text
   language_id: 111148035
+Dune:
+  type: programming
+  ace_mode: lisp
+  filenames:
+  - dune-project
+  tm_scope: source.dune
+  color: "#89421e"
+  language_id: 754574151
 Dylan:
   type: programming
   color: "#6c616e"
diff --git a/samples/Dune/filenames/dune-project b/samples/Dune/filenames/dune-project
new file mode 100644
index 0000000000..a9e1089a07
--- /dev/null
+++ b/samples/Dune/filenames/dune-project
@@ -0,0 +1,63 @@
+(lang dune 2.9)
+
+(name reason)
+
+(using menhir 2.0)
+
+(cram enable)
+
+(version 3.8.2)
+
+(generate_opam_files true)
+
+(source
+ (github reasonml/reason))
+
+(authors "Jordan Walke <jordojw@gmail.com>")
+
+(maintainers
+ "Jordan Walke <jordojw@gmail.com>"
+ "Antonio Nuno Monteiro <anmonteiro@gmail.com>")
+
+(homepage "https://reasonml.github.io/")
+
+(bug_reports "https://github.com/reasonml/reason/issues")
+
+(license "MIT")
+
+(package
+ (name reason)
+ (synopsis "Reason: Syntax & Toolchain for OCaml")
+ (description
+  "Reason gives OCaml a new syntax that is remniscient of languages like\nJavaScript. It's also the umbrella project for a set of tools for the OCaml &\nJavaScript ecosystem.")
+ (depends
+  (ocaml
+   (and
+    (>= "4.03")
+    (< "5.2")))
+  (ocamlfind :build)
+  (dune-build-info
+   (>= 2.9.3))
+  (menhir
+   (>= "20180523"))
+  (merlin-extend
+   (>= "0.6"))
+  fix
+  ppx_derivers
+  (ppxlib
+   (>= "0.28.0"))))
+
+(package
+ (name rtop)
+ (synopsis "Reason toplevel")
+ (description
+  "rtop is the toplevel (or REPL) for Reason, based on utop (https://github.com/diml/utop).")
+ (depends
+  (ocaml
+   (and
+    (>= "4.03")
+    (< "5.2")))
+  (reason
+   (= :version))
+  (utop
+   (>= "2.0"))))
diff --git a/vendor/README.md b/vendor/README.md
index 78d7a7e420..71363f19a7 100644
--- a/vendor/README.md
+++ b/vendor/README.md
@@ -147,6 +147,7 @@ This is a list of grammars that Linguist selects to provide syntax highlighting
 - **Diff:** [textmate/diff.tmbundle](https://github.com/textmate/diff.tmbundle)
 - **Dockerfile:** [asbjornenge/Docker.tmbundle](https://github.com/asbjornenge/Docker.tmbundle)
 - **Dotenv:** [Alhadis/language-etc](https://github.com/Alhadis/language-etc)
+- **Dune:** [maelvls/vscode-dune](https://github.com/maelvls/vscode-dune)
 - **Dylan:** [textmate/dylan.tmbundle](https://github.com/textmate/dylan.tmbundle)
 - **E-mail:** [mariozaizar/language-eml](https://github.com/mariozaizar/language-eml)
 - **EBNF:** [Alhadis/language-grammars](https://github.com/Alhadis/language-grammars)
diff --git a/vendor/grammars/vscode-dune b/vendor/grammars/vscode-dune
new file mode 160000
index 0000000000..cd0c2057c2
--- /dev/null
+++ b/vendor/grammars/vscode-dune
@@ -0,0 +1 @@
+Subproject commit cd0c2057c24253bf1bfefc804ef496a30213960c
diff --git a/vendor/licenses/git_submodule/vscode-dune.dep.yml b/vendor/licenses/git_submodule/vscode-dune.dep.yml
new file mode 100644
index 0000000000..6cc5147f1b
--- /dev/null
+++ b/vendor/licenses/git_submodule/vscode-dune.dep.yml
@@ -0,0 +1,31 @@
+---
+name: vscode-dune
+version: cd0c2057c24253bf1bfefc804ef496a30213960c
+type: git_submodule
+homepage: https://github.com/maelvls/vscode-dune.git
+license: mit
+licenses:
+- sources: LICENSE
+  text: |
+    MIT License
+
+    Copyright (c) 2019 Maël Valais
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+notices: []