diff --git a/README.md b/README.md
index adf49655..6e5ef26e 100644
--- a/README.md
+++ b/README.md
@@ -126,7 +126,7 @@ formatting.
 | Puppet | [puppet](https://puppet.com), [puppet-lint](https://puppet-lint.com) |
 | Python | [autopep8](https://github.com/hhatto/autopep8), [flake8](http://flake8.pycqa.org/en/latest/), [isort](https://github.com/timothycrosley/isort), [mypy](http://mypy-lang.org/), [pycodestyle](https://github.com/PyCQA/pycodestyle), [pylint](https://www.pylint.org/) !!, [yapf](https://github.com/google/yapf) |
 | R | [lintr](https://github.com/jimhester/lintr) |
-| ReasonML | [merlin](https://github.com/the-lambda-church/merlin) see `:help ale-integration-reason-merlin` for configuration instructions |
+| ReasonML | [merlin](https://github.com/the-lambda-church/merlin) see `:help ale-integration-reason-merlin` for configuration instructions, [refmt](https://github.com/reasonml/reason-cli) |
 | reStructuredText | [proselint](http://proselint.com/), [write-good](https://github.com/btford/write-good) |
 | RPM spec | [rpmlint](https://github.com/rpm-software-management/rpmlint) (disabled by default; see `:help ale-integration-spec`) |
 | Ruby | [brakeman](http://brakemanscanner.org/) !!, [rails_best_practices](https://github.com/flyerhzm/rails_best_practices) !!, [reek](https://github.com/troessner/reek), [rubocop](https://github.com/bbatsov/rubocop), [ruby](https://www.ruby-lang.org) |
diff --git a/autoload/ale/fix/registry.vim b/autoload/ale/fix/registry.vim
index 5aa78ac5..37bbee9f 100644
--- a/autoload/ale/fix/registry.vim
+++ b/autoload/ale/fix/registry.vim
@@ -127,6 +127,11 @@ let s:default_registry = {
 \       'suggested_filetypes': ['haskell'],
 \       'description': 'Fix Haskell files with hfmt.',
 \   },
+\   'refmt': {
+\       'function': 'ale#fixers#refmt#Fix',
+\       'suggested_filetypes': ['reason'],
+\       'description': 'Fix ReasonML files with refmt.',
+\   },
 \}
 
 " Reset the function registry to the default entries.
diff --git a/autoload/ale/fixers/refmt.vim b/autoload/ale/fixers/refmt.vim
new file mode 100644
index 00000000..514f950a
--- /dev/null
+++ b/autoload/ale/fixers/refmt.vim
@@ -0,0 +1,18 @@
+" Author: Ahmed El Gabri <@ahmedelgabri>
+" Description: Integration of refmt with ALE.
+
+call ale#Set('reasonml_refmt_executable', 'refmt')
+call ale#Set('reasonml_refmt_options', '')
+
+function! ale#fixers#refmt#Fix(buffer) abort
+    let l:executable = ale#Var(a:buffer, 'reasonml_refmt_executable')
+    let l:options = ale#Var(a:buffer, 'reasonml_refmt_options')
+
+    return {
+    \   'command': ale#Escape(l:executable)
+    \       . (empty(l:options) ? '' : ' ' . l:options)
+    \       . ' --in-place'
+    \       . ' %t',
+    \   'read_temporary_file': 1,
+    \}
+endfunction
diff --git a/doc/ale-reasonml.txt b/doc/ale-reasonml.txt
index 17a7b2e1..d533d856 100644
--- a/doc/ale-reasonml.txt
+++ b/doc/ale-reasonml.txt
@@ -10,6 +10,22 @@ merlin                                                    *ale-reasonml-merlin*
   detailed instructions
   (https://github.com/the-lambda-church/merlin/wiki/vim-from-scratch).
 
+===============================================================================
+refmt                                                      *ale-reasonml-refmt*
+
+g:ale_reasonml_refmt_executable               *g:ale_reasonml_refmt_executable*
+                                              *b:ale_reasonml_refmt_executable*
+  Type: |String|
+  Default: `'refmt'`
+
+  This variable can be set to pass the path of the refmt fixer.
+
+g:ale_reasonml_refmt_options                     *g:ale_reasonml_refmt_options*
+                                                 *b:ale_reasonml_refmt_options*
+  Type: |String|
+  Default: `''`
+
+  This variable can be set to pass additional options to the refmt fixer.
 
 ===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:
diff --git a/doc/ale.txt b/doc/ale.txt
index 20269788..58a58e35 100644
--- a/doc/ale.txt
+++ b/doc/ale.txt
@@ -150,6 +150,7 @@ CONTENTS                                                         *ale-contents*
       lintr...............................|ale-r-lintr|
     reasonml..............................|ale-reasonml-options|
       merlin..............................|ale-reasonml-merlin|
+      refmt...............................|ale-reasonml-refmt|
     restructuredtext......................|ale-restructuredtext-options|
       write-good..........................|ale-restructuredtext-write-good|
     ruby..................................|ale-ruby-options|
@@ -308,7 +309,7 @@ Notes:
 * Puppet: `puppet`, `puppet-lint`
 * Python: `autopep8`, `flake8`, `isort`, `mypy`, `pycodestyle`, `pylint`!!, `yapf`
 * R: `lintr`
-* ReasonML: `merlin`
+* ReasonML: `merlin`, `refmt`
 * reStructuredText: `proselint`, `write-good`
 * RPM spec: `rpmlint`
 * Ruby: `brakeman`, `rails_best_practices`!!, `reek`, `rubocop`, `ruby`
diff --git a/test/fixers/test_refmt_fixer_callback.vader b/test/fixers/test_refmt_fixer_callback.vader
new file mode 100644
index 00000000..9ec331e4
--- /dev/null
+++ b/test/fixers/test_refmt_fixer_callback.vader
@@ -0,0 +1,41 @@
+Before:
+  Save g:ale_reasonml_refmt_executable
+  Save g:ale_reasonml_refmt_options
+
+  " Use an invalid global executable, so we don't match it.
+  let g:ale_reasonml_refmt_executable = 'xxxinvalid'
+  let g:ale_reasonml_refmt_options = ''
+
+  call ale#test#SetDirectory('/testplugin/test/fixers')
+
+After:
+  Restore
+
+  call ale#test#RestoreDirectory()
+
+Execute(The refmt callback should return the correct default values):
+  call ale#test#SetFilename('../reasonml_files/testfile.re')
+
+  AssertEqual
+  \ {
+  \   'read_temporary_file': 1,
+  \   'command': ale#Escape('xxxinvalid')
+  \     . ' --in-place'
+  \     . ' %t',
+  \ },
+  \ ale#fixers#refmt#Fix(bufnr(''))
+
+Execute(The refmt callback should include custom refmt options):
+  let g:ale_reasonml_refmt_options = "-w 80"
+  call ale#test#SetFilename('../reasonml_files/testfile.re')
+
+  AssertEqual
+  \ {
+  \   'read_temporary_file': 1,
+  \   'command': ale#Escape('xxxinvalid')
+  \     . ' ' . g:ale_reasonml_refmt_options
+  \     . ' --in-place'
+  \     . ' %t',
+  \ },
+  \ ale#fixers#refmt#Fix(bufnr(''))
+
diff --git a/test/reasonml_files/testfile.re b/test/reasonml_files/testfile.re
new file mode 100644
index 00000000..e69de29b