diff --git a/src/bin/cli.ml b/src/bin/cli.ml
index 3ff01bd1e..1142a1f31 100644
--- a/src/bin/cli.ml
+++ b/src/bin/cli.ml
@@ -75,20 +75,26 @@ let display_format =
     let docv = "DISPLAY_FORMAT" in
     let doc = "$(docv) is the format that will be used by the CLI. Available formats are 'dev', 'json', and 'human-readable' (default). When human-readable lacks details (we are still tweaking it), please contact us and use another format in the meanwhile." in
     info ~docv ~doc ["format" ; "display-format"] in
-  value @@ opt string "human-readable" info
+  value @@
+  opt
+    (enum [("human-readable", `Human_readable); ("dev", `Dev); ("json", `Json)])
+    `Human_readable
+    info
 
 let michelson_code_format =
   let open Arg in
   let info  =
     let docv = "MICHELSON_FORMAT" in
-    let doc = "$(docv) is the format that will be used by compile-contract for the resulting Michelson. Available formats are 'micheline', and 'michelson' (default). Micheline is the format used by [XXX]." in
+    let doc = "$(docv) is the format that will be used by compile-contract for the resulting Michelson. Available formats are 'text' (default), 'json' and 'hex'." in
     info ~docv ~doc ["michelson-format"] in
-  value @@ opt string "michelson" info
+  value @@
+  opt
+    (enum [("text", `Text); ("json", `Json); ("hex", `Hex)])
+    `Text info
 
 let compile_file =
   let f source_file entry_point syntax display_format michelson_format =
     toplevel ~display_format @@
-    let%bind michelson_format = Main.Display.michelson_format_of_string michelson_format in
     let%bind contract =
       trace (simple_info "compiling contract to michelson") @@
       Ligo.Compile.Of_source.compile_file_contract_entry source_file entry_point (Syntax_name syntax) in
diff --git a/src/bin/cli_helpers.ml b/src/bin/cli_helpers.ml
index 7057e0975..cb25dd084 100644
--- a/src/bin/cli_helpers.ml
+++ b/src/bin/cli_helpers.ml
@@ -1,16 +1,9 @@
 open Trace
 open Main.Display
 
-let toplevel ~(display_format : string) (x : string result) =
-  let display_format =
-    try display_format_of_string display_format
-    with _ -> (
-        Format.printf "bad display format %s, try looking at DISPLAY_FORMAT in the man (--help)." display_format ;
-        failwith "Display format"
-      )
-  in
+let toplevel ~(display_format : display_format) (x : string result) =
   match x with
-  | Ok _ -> Format.printf "%a\n%!" (formatted_string_result_pp display_format) x
+  | Ok _ -> Format.printf "%a%!" (formatted_string_result_pp display_format) x
   | Error _ ->
-     Format.eprintf "%a\n%!" (formatted_string_result_pp display_format) x ;
+     Format.eprintf "%a%!" (formatted_string_result_pp display_format) x ;
      exit 1
diff --git a/src/bin/cli_helpers.mli b/src/bin/cli_helpers.mli
index 18fce0b58..e3e57f0a5 100644
--- a/src/bin/cli_helpers.mli
+++ b/src/bin/cli_helpers.mli
@@ -1,3 +1,3 @@
 open Trace
 
-val toplevel : display_format : string -> string result -> unit
+val toplevel : display_format : Main.Display.display_format -> string result -> unit
diff --git a/src/main/display.ml b/src/main/display.ml
index 614ca60c7..da22fa883 100644
--- a/src/main/display.ml
+++ b/src/main/display.ml
@@ -87,13 +87,6 @@ type display_format = [
   | `Dev
 ]
 
-let display_format_of_string = fun s : display_format ->
-  match s with
-  | "dev" -> `Dev
-  | "json" -> `Json
-  | "human-readable" -> `Human_readable
-  | _ -> failwith "bad display_format"
-
 let formatted_string_result_pp (display_format : display_format) =
   match display_format with
   | `Human_readable -> string_result_pp_hr
@@ -101,16 +94,12 @@ let formatted_string_result_pp (display_format : display_format) =
   | `Json -> string_result_pp_json
 
 type michelson_format = [
-  | `Michelson
-  | `Micheline
+  | `Text
+  | `Json
+  | `Hex
 ]
 
-let michelson_format_of_string = fun s : michelson_format result ->
-  match s with
-  | "michelson" -> ok `Michelson
-  | "micheline" -> ok `Micheline
-  | _ -> simple_fail "bad michelson format"
-
 let michelson_pp (mf : michelson_format) = match mf with
-  | `Michelson -> Michelson.pp
-  | `Micheline -> Michelson.pp_json
+  | `Text -> Michelson.pp
+  | `Json -> Michelson.pp_json
+  | `Hex -> Michelson.pp_hex
diff --git a/src/main/display.mli b/src/main/display.mli
index dc6cc2408..9dea6d65c 100644
--- a/src/main/display.mli
+++ b/src/main/display.mli
@@ -21,15 +21,12 @@ type display_format = [
   | `Dev
 ]
 
-val display_format_of_string : string -> display_format
-
 val formatted_string_result_pp : display_format -> Format.formatter -> string Simple_utils.Trace.result -> unit
 
 type michelson_format = [
-  | `Michelson
-  | `Micheline
+  | `Text
+  | `Json
+  | `Hex
 ]
 
-val michelson_format_of_string : string -> michelson_format Simple_utils.Trace.result
-
 val michelson_pp : michelson_format -> Format.formatter -> Tezos_utils.Michelson.michelson -> unit
diff --git a/vendors/ligo-utils/tezos-utils/x_michelson.ml b/vendors/ligo-utils/tezos-utils/x_michelson.ml
index a922fa382..5f9549998 100644
--- a/vendors/ligo-utils/tezos-utils/x_michelson.ml
+++ b/vendors/ligo-utils/tezos-utils/x_michelson.ml
@@ -1,7 +1,8 @@
 open Tezos_micheline
 open Micheline
 
-include Memory_proto_alpha.Protocol.Michelson_v1_primitives
+open Memory_proto_alpha.Protocol
+include Michelson_v1_primitives
 
 type michelson = (int, prim) node
 type t = michelson
@@ -97,3 +98,10 @@ let pp_json ppf (michelson : michelson) =
     )
   in
   Format.fprintf ppf "%a" Tezos_data_encoding.Json.pp json
+
+let pp_hex ppf (michelson : michelson) =
+  let canonical = strip_locations michelson in
+  let bytes = Tezos_data_encoding.Binary_writer.to_bytes_exn Script_repr.expr_encoding canonical in
+  let bytes = Tezos_stdlib.MBytes.to_bytes bytes in
+  let hex = Hex.of_bytes bytes in
+  Format.fprintf ppf "%a" Hex.pp hex