diff --git a/.ocamlformat b/.ocamlformat
index 484d5d0d..dfe4da87 100644
--- a/.ocamlformat
+++ b/.ocamlformat
@@ -4,4 +4,4 @@ exp-grouping = preserve
 break-fun-decl = smart
 wrap-comments
 parse-docstrings
-version=0.20.1
+version=0.21.0
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d5fd3af5..95f5acbb 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -89,7 +89,7 @@ You can look at the
 [online OCaml documentation](https://catala-lang.org/ocaml_docs/) for the
 different modules' interfaces as well as high-level architecture documentation.
 
-Please note that the `ocamlformat` version this project uses is `0.20.1`.
+Please note that the `ocamlformat` version this project uses is `0.21.0`.
 Using another version may cause spurious diffs to appear in your pull requests.
 
 ### Example: adding a builtin function
diff --git a/Makefile b/Makefile
index 905cf269..29414dd8 100644
--- a/Makefile
+++ b/Makefile
@@ -41,7 +41,7 @@ COMPILER_DIR=compiler
 BUILD_SYSTEM_DIR=build_system
 
 format:
-	dune build @fmt --auto-promote
+	dune build @fmt --auto-promote >/dev/null
 
 #> build_dev				: Builds the Catala compiler, without formatting code
 build_dev:
diff --git a/compiler/dcalc/ast.ml b/compiler/dcalc/ast.ml
index 281096f7..e22f9cb7 100644
--- a/compiler/dcalc/ast.ml
+++ b/compiler/dcalc/ast.ml
@@ -481,8 +481,7 @@ let make_let_in
 let empty_thunked_term : expr Pos.marked =
   let silent = Var.make ("_", Pos.no_pos) in
   Bindlib.unbox
-    (make_abs
-       (Array.of_list [ silent ])
+    (make_abs (Array.of_list [ silent ])
        (Bindlib.box (ELit LEmptyError, Pos.no_pos))
        Pos.no_pos
        [ (TLit TUnit, Pos.no_pos) ]
@@ -611,9 +610,7 @@ let build_whole_scope_expr
     (pos_scope : Pos.t) : 'expr Pos.marked Bindlib.box =
   let var, body_expr = Bindlib.unbind body.scope_body_expr in
   let body_expr = unfold_scope_body_expr ~box_expr ~make_let_in ctx body_expr in
-  make_abs
-    (Array.of_list [ var ])
-    body_expr pos_scope
+  make_abs (Array.of_list [ var ]) body_expr pos_scope
     [
       ( TTuple
           ( List.map snd
diff --git a/compiler/desugared/ast.ml b/compiler/desugared/ast.ml
index 3e0398e7..5a05affb 100644
--- a/compiler/desugared/ast.ml
+++ b/compiler/desugared/ast.ml
@@ -321,9 +321,7 @@ let make_let_in
     (e2 : expr Pos.marked Bindlib.box) : expr Pos.marked Bindlib.box =
   Bindlib.box_apply2
     (fun e u -> (EApp (e, u), Pos.get_position (Bindlib.unbox e2)))
-    (make_abs
-       (Array.of_list [ x ])
-       e2
+    (make_abs (Array.of_list [ x ]) e2
        (Pos.get_position (Bindlib.unbox e2))
        [ tau ]
        (Pos.get_position (Bindlib.unbox e2)))
diff --git a/compiler/scopelang/ast.ml b/compiler/scopelang/ast.ml
index 5793112f..c2e57127 100644
--- a/compiler/scopelang/ast.ml
+++ b/compiler/scopelang/ast.ml
@@ -193,9 +193,7 @@ let make_let_in
     (e2 : expr Pos.marked Bindlib.box) : expr Pos.marked Bindlib.box =
   Bindlib.box_apply2
     (fun e u -> (EApp (e, u), Pos.get_position (Bindlib.unbox e2)))
-    (make_abs
-       (Array.of_list [ x ])
-       e2
+    (make_abs (Array.of_list [ x ]) e2
        (Pos.get_position (Bindlib.unbox e2))
        [ tau ]
        (Pos.get_position (Bindlib.unbox e2)))