diff --git a/dune b/dune
deleted file mode 100644
index 7066f179f..000000000
--- a/dune
+++ /dev/null
@@ -1,7 +0,0 @@
-(env
-  (_ (flags (:standard -warn-error -69-67-37 -w +a -g))
-  (link_flags (:standard -g))
-  (js_of_ocaml (flags (:standard --no-inline --debug-info --source-map)) (link_flags (:standard)))
-  )
-)
-
diff --git a/dune-project b/dune-project
index 96e7f248f..7655de077 100644
--- a/dune-project
+++ b/dune-project
@@ -1 +1 @@
-(lang dune 3.7 )
+(lang dune 1.1)
diff --git a/gui/dune b/gui/dune
index bbb2e6e66..bde3e5cd8 100644
--- a/gui/dune
+++ b/gui/dune
@@ -3,7 +3,7 @@
  (modules Common)
  (libraries js_of_ocaml-lwt)
  (preprocess (pps js_of_ocaml-ppx tyxml-ppx))
- (flags :standard
+ (flags :standard -w +a
         -open Js_of_ocaml))
 
 (executable
@@ -12,7 +12,7 @@
  (modules KaSimWorker)
  (libraries kappa_js_lib kappa_json_api)
  (preprocess (pps js_of_ocaml-ppx tyxml-ppx))
- (flags :standard
+ (flags :standard -w +a
         -open Js_of_ocaml
         -open Kappa_js_lib
         -open Kappa_json_api))
@@ -23,7 +23,7 @@
  (modules KaSaWorker)
  (libraries kappa_js_lib kappa_kasa_export)
  (preprocess (pps js_of_ocaml-ppx tyxml-ppx))
- (flags :standard
+ (flags :standard -w +a
         -open Js_of_ocaml
         -open Kappa_js_lib
         -open Kappa_kasa_export))
@@ -34,7 +34,7 @@
  (modules KaStorWorker)
  (libraries kappa_js_lib kappa_cflow)
  (preprocess (pps js_of_ocaml-ppx tyxml-ppx))
- (flags :standard
+ (flags :standard -w +a
         -open Js_of_ocaml
         -open Kappa_js_lib
         -open Kappa_cflow))
@@ -45,7 +45,7 @@
  (modules KaMoHaWorker)
  (libraries kappa_js_lib kappa_grammar)
  (preprocess (pps js_of_ocaml-ppx tyxml-ppx))
- (flags :standard ))
+ (flags :standard -w +a))
 
 (executable
  (name JsSim)
@@ -53,7 +53,7 @@
  (modules :standard \ Common KaSimWorker KaSaWorker KaStorWorker KaMoHaWorker)
  (libraries js_of_ocaml-tyxml lwt_react kappa_js_lib kappa_json_api kappa_parameters)
  (preprocess (pps js_of_ocaml-ppx tyxml-ppx))
- (flags :standard
+ (flags :standard -w +a
         -open Js_of_ocaml
         -open Js_of_ocaml_tyxml
         -open Kappa_js_lib