diff --git a/.vscode/settings.json b/.vscode/settings.json
index de1d748..abd40a3 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,5 +1,6 @@
 {
   "editor.formatOnType": true,
   "editor.formatOnSave": true,
-  "nixEnvSelector.nixFile": "${workspaceRoot}/shell.nix"
+  "nixEnvSelector.nixFile": "${workspaceRoot}/shell.nix",
+  "haskell.formattingProvider": "fourmolu"
 }
diff --git a/README.md b/README.md
index 78ba201..6c0965a 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # haskell-template
 
-Haskell project template optimized for a fully reproducible and friendly development environment. Based on [Nix](http://www.srid.ca/haskell-nix) + [Flakes](https://serokell.io/blog/practical-nix-flakes) + VSCode ([HLS](https://github.com/haskell/haskell-language-server)) + [ormolu](https://github.com/tweag/ormolu) autoformatting + [Relude](https://github.com/kowainik/relude#relude) as Prelude.
+Haskell project template optimized for a fully reproducible and friendly development environment. Based on [Nix](http://www.srid.ca/haskell-nix) + [Flakes](https://serokell.io/blog/practical-nix-flakes) + VSCode ([HLS](https://github.com/haskell/haskell-language-server)) + [fourmolu](https://github.com/fourmolu/fourmolu) autoformatting + [Relude](https://github.com/kowainik/relude#relude) as Prelude.
 
 ## Getting Started
 
diff --git a/bin/format b/bin/format
index 9e732c8..d9b7096 100755
--- a/bin/format
+++ b/bin/format
@@ -1,6 +1,6 @@
 #!/usr/bin/env nix-shell 
 #! nix-shell ../shell.nix -i bash
 set -xe
-find src -name \*.hs | xargs ormolu -m inplace -o -XImportQualifiedPost -o -XTypeApplications
+find src -name \*.hs | xargs fourmolu -m inplace -o -XImportQualifiedPost -o -XTypeApplications
 nixpkgs-fmt *.nix
 cabal-fmt -i *.cabal
\ No newline at end of file
diff --git a/flake.nix b/flake.nix
index a3464a6..159958b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -39,7 +39,7 @@
                   cabal-install
                   ghcid
                   haskell-language-server
-                  ormolu
+                  fourmolu
                   hlint
                   pkgs.nixpkgs-fmt
                 ]);
diff --git a/fourmolu.yaml b/fourmolu.yaml
new file mode 100644
index 0000000..ef5582d
--- /dev/null
+++ b/fourmolu.yaml
@@ -0,0 +1,8 @@
+indentation: 2
+comma-style: leading
+record-brace-space: true 
+indent-wheres: true
+diff-friendly-import-export: true 
+respectful: true 
+haddock-style: multi-line 
+newlines-between-decls: 1 
\ No newline at end of file
diff --git a/src/Main.hs b/src/Main.hs
index 175d8b3..a853643 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -2,6 +2,12 @@ module Main where
 
 import Main.Utf8 (withUtf8)
 
+{- |
+ Main entry point.
+
+ The `bin/run` script will invoke this function. See `.ghcid` file to change
+ that.
+-}
 main :: IO ()
 main = do
   -- For withUtf8, see https://serokell.io/blog/haskell-with-utf8