diff --git a/.ocamlformat b/.ocamlformat
index 87496a125..ad5b55b6f 100644
--- a/.ocamlformat
+++ b/.ocamlformat
@@ -1,5 +1,5 @@
 profile = default
-version = 0.26.1
+version = 0.26.2
 
 field-space = tight-decl
 break-cases = toplevel
diff --git a/.vscode/settings.json b/.vscode/settings.json
index c7e28bd31..7e7f928b2 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -4,7 +4,7 @@
 	"typescript.tsc.autoDetect": "off",
 	"typescript.preferences.quoteStyle": "single",
 	"editor.codeActionsOnSave": {
-		"source.fixAll.eslint": true
+		"source.fixAll.eslint": "explicit"
 	},
 	"ocaml.sandbox": {
 		"kind": "opam",
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1a7a0668c..305d3552a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -42,7 +42,7 @@ At the root:
 
 ```sh
 # If you haven't created the switch, do it. OPAM(https://opam.ocaml.org)
-opam switch 4.14.0 # can also create local switch with opam switch create . 4.14.0
+opam switch 5.2.0 # can also create local switch with opam switch create . 5.2.0
 
 # Install dev dependencies from OPAM
 opam install . --deps-only
@@ -51,6 +51,9 @@ opam install . --deps-only
 opam install ocaml-lsp-server ocamlformat
 ```
 
+You need `dune` to build the OCaml source code, if it is not available in your shell try running `eval $(opam env)`.
+If `dune` is present, run `make build` to build the OCaml projects and copy the binaries to the root.
+
 ## Build & Run
 
 - `npm run compile`. You don't need this if you're developing this repo in VSCode. The compilation happens automatically in the background.
diff --git a/analysis/reanalyze/src/Arnold.ml b/analysis/reanalyze/src/Arnold.ml
index e78222053..64f10b1f1 100644
--- a/analysis/reanalyze/src/Arnold.ml
+++ b/analysis/reanalyze/src/Arnold.ml
@@ -813,10 +813,10 @@ module Compile = struct
             | _ ->
               Stats.logHygieneNamedArgValue ~label ~loc;
               raise ArgError
-            [@@raises ArgError]
+              [@@raises ArgError]
           in
           functionArg ()
-          [@@raises ArgError]
+            [@@raises ArgError]
         in
         let functionArgsOpt =
           try Some (functionDefinition.kind |> List.map getFunctionArg)
@@ -1320,7 +1320,7 @@ let traverseAst ~valueBindingsTable =
                    progressFunctionsFromAttributes valueBinding.vb_attributes
                  with
                  | None -> (progressFunctions, functionsToAnalyze)
-                 | Some newProgressFunctions -> (
+                 | Some newProgressFunctions ->
                    ( StringSet.union
                        (StringSet.of_list newProgressFunctions)
                        progressFunctions,
@@ -1328,7 +1328,7 @@ let traverseAst ~valueBindingsTable =
                      | Tpat_var (id, _) ->
                        (Ident.name id, valueBinding.vb_expr.exp_loc)
                        :: functionsToAnalyze
-                     | _ -> functionsToAnalyze )))
+                     | _ -> functionsToAnalyze ))
                (StringSet.empty, [])
         in
         (progressFunctions0, functionsToAnalyze0 |> List.rev)
diff --git a/analysis/reanalyze/src/DeadValue.ml b/analysis/reanalyze/src/DeadValue.ml
index ffbc8361b..791213e08 100644
--- a/analysis/reanalyze/src/DeadValue.ml
+++ b/analysis/reanalyze/src/DeadValue.ml
@@ -45,12 +45,12 @@ let collectValueBinding super self (vb : Typedtree.value_binding) =
         | _ -> false
       in
       (if (not exists) && not isFirstClassModule then
-       (* This is never toplevel currently *)
-       let isToplevel = oldLastBinding = Location.none in
-       let sideEffects = SideEffects.checkExpr vb.vb_expr in
-       name
-       |> addValueDeclaration ~isToplevel ~loc ~moduleLoc:currentModulePath.loc
-            ~optionalArgs ~path ~sideEffects);
+         (* This is never toplevel currently *)
+         let isToplevel = oldLastBinding = Location.none in
+         let sideEffects = SideEffects.checkExpr vb.vb_expr in
+         name
+         |> addValueDeclaration ~isToplevel ~loc
+              ~moduleLoc:currentModulePath.loc ~optionalArgs ~path ~sideEffects);
       (match PosHash.find_opt decls loc_start with
       | None -> ()
       | Some decl ->
diff --git a/analysis/reanalyze/src/Exception.ml b/analysis/reanalyze/src/Exception.ml
index 2973c3946..95bade64a 100644
--- a/analysis/reanalyze/src/Exception.ml
+++ b/analysis/reanalyze/src/Exception.ml
@@ -138,20 +138,20 @@ module Event = struct
         if !Common.Cli.debug then Log_.item "%a@." print ev;
         let nestedExceptions = loop Exceptions.empty nestedEvents in
         (if Exceptions.isEmpty nestedExceptions (* catch-all *) then
-         let name =
-           match nestedEvents with
-           | {kind = Call {callee}} :: _ -> callee |> Common.Path.toName
-           | _ -> "expression" |> Name.create
-         in
-         Log_.warning ~loc
-           (Common.ExceptionAnalysis
-              {
-                message =
-                  Format.asprintf
-                    "@{<info>%s@} does not raise and is annotated with \
-                     redundant @doesNotRaise"
-                    (name |> Name.toString);
-              }));
+           let name =
+             match nestedEvents with
+             | {kind = Call {callee}} :: _ -> callee |> Common.Path.toName
+             | _ -> "expression" |> Name.create
+           in
+           Log_.warning ~loc
+             (Common.ExceptionAnalysis
+                {
+                  message =
+                    Format.asprintf
+                      "@{<info>%s@} does not raise and is annotated with \
+                       redundant @doesNotRaise"
+                      (name |> Name.toString);
+                }));
         loop exnSet rest
       | ({kind = Catches nestedEvents; exceptions} as ev) :: rest ->
         if !Common.Cli.debug then Log_.item "%a@." print ev;
@@ -192,11 +192,11 @@ module Checks = struct
     let missingAnnotations = Exceptions.diff raiseSet exceptions in
     let redundantAnnotations = Exceptions.diff exceptions raiseSet in
     (if not (Exceptions.isEmpty missingAnnotations) then
-     let description =
-       Common.ExceptionAnalysisMissing
-         {exnName; exnTable; raiseSet; missingAnnotations; locFull}
-     in
-     Log_.warning ~loc description);
+       let description =
+         Common.ExceptionAnalysisMissing
+           {exnName; exnTable; raiseSet; missingAnnotations; locFull}
+       in
+       Log_.warning ~loc description);
     if not (Exceptions.isEmpty redundantAnnotations) then
       Log_.warning ~loc
         (Common.ExceptionAnalysis
@@ -356,14 +356,14 @@ let traverseAst () =
       cases |> iterCases self
     | _ -> super.expr self expr |> ignore);
     (if isDoesNoRaise then
-     let nestedEvents = !currentEvents in
-     currentEvents :=
-       {
-         Event.exceptions = Exceptions.empty;
-         loc;
-         kind = DoesNotRaise nestedEvents;
-       }
-       :: oldEvents);
+       let nestedEvents = !currentEvents in
+       currentEvents :=
+         {
+           Event.exceptions = Exceptions.empty;
+           loc;
+           kind = DoesNotRaise nestedEvents;
+         }
+         :: oldEvents);
     expr
   in
   let getExceptionsFromAnnotations attributes =
diff --git a/analysis/reanalyze/src/Log_.ml b/analysis/reanalyze/src/Log_.ml
index ec98987cd..2bb6aa0e9 100644
--- a/analysis/reanalyze/src/Log_.ml
+++ b/analysis/reanalyze/src/Log_.ml
@@ -75,10 +75,10 @@ module Loc = struct
         pos_cnum = char;
         pos_fname =
           (let open Filename in
-          match is_implicit pos.pos_fname with
-          | _ when !Cli.ci -> basename pos.pos_fname
-          | true -> concat (Sys.getcwd ()) pos.pos_fname
-          | false -> pos.pos_fname);
+           match is_implicit pos.pos_fname with
+           | _ when !Cli.ci -> basename pos.pos_fname
+           | true -> concat (Sys.getcwd ()) pos.pos_fname
+           | false -> pos.pos_fname);
       }
     in
     Location.print_loc ppf
diff --git a/analysis/reanalyze/src/Reanalyze.ml b/analysis/reanalyze/src/Reanalyze.ml
index 0355c9cb7..e52a9c1f4 100644
--- a/analysis/reanalyze/src/Reanalyze.ml
+++ b/analysis/reanalyze/src/Reanalyze.ml
@@ -110,7 +110,7 @@ let cli () =
   let versionAndExit () =
     print_endline usage;
     exit 0
-    [@@raises exit]
+      [@@raises exit]
   in
   let rec setAll cmtRoot =
     RunConfig.all ();
@@ -216,7 +216,7 @@ let cli () =
   if !analysisKindSet = false then setConfig ();
   let cmtRoot = !cmtRootRef in
   runAnalysisAndReport ~cmtRoot
-  [@@raises exit]
+[@@raises exit]
 
 module RunConfig = RunConfig
 module Log_ = Log_
diff --git a/analysis/reanalyze/src/WriteDeadAnnotations.ml b/analysis/reanalyze/src/WriteDeadAnnotations.ml
index fb99fa24a..642bb3d87 100644
--- a/analysis/reanalyze/src/WriteDeadAnnotations.ml
+++ b/analysis/reanalyze/src/WriteDeadAnnotations.ml
@@ -42,33 +42,33 @@ let rec lineToString_ {original; declarations} =
     {
       original =
         (if String.length original >= col && col > 0 then
-         let original1, original2 =
-           try
-             ( String.sub original 0 col,
-               String.sub original col (originalLen - col) )
-           with Invalid_argument _ -> (original, "")
-         in
-         if language = Res && declKind = VariantCase then
-           if
-             String.length original2 >= 2
-             && (String.sub [@doesNotRaise]) original2 0 2 = "| "
-           then
-             original1 ^ "| " ^ annotationStr
-             ^ (String.sub [@doesNotRaise]) original2 2
-                 (String.length original2 - 2)
-           else if
-             String.length original2 >= 1
-             && (String.sub [@doesNotRaise]) original2 0 1 = "|"
-           then
-             original1 ^ "|" ^ annotationStr
-             ^ (String.sub [@doesNotRaise]) original2 1
-                 (String.length original2 - 1)
-           else original1 ^ "| " ^ annotationStr ^ original2
-         else original1 ^ annotationStr ^ original2
-        else
-          match language = Ml with
-          | true -> original ^ annotationStr
-          | false -> annotationStr ^ original);
+           let original1, original2 =
+             try
+               ( String.sub original 0 col,
+                 String.sub original col (originalLen - col) )
+             with Invalid_argument _ -> (original, "")
+           in
+           if language = Res && declKind = VariantCase then
+             if
+               String.length original2 >= 2
+               && (String.sub [@doesNotRaise]) original2 0 2 = "| "
+             then
+               original1 ^ "| " ^ annotationStr
+               ^ (String.sub [@doesNotRaise]) original2 2
+                   (String.length original2 - 2)
+             else if
+               String.length original2 >= 1
+               && (String.sub [@doesNotRaise]) original2 0 1 = "|"
+             then
+               original1 ^ "|" ^ annotationStr
+               ^ (String.sub [@doesNotRaise]) original2 1
+                   (String.length original2 - 1)
+             else original1 ^ "| " ^ annotationStr ^ original2
+           else original1 ^ annotationStr ^ original2
+         else
+           match language = Ml with
+           | true -> original ^ annotationStr
+           | false -> annotationStr ^ original);
       declarations = nextDeclarations;
     }
     |> lineToString_
@@ -91,7 +91,7 @@ let readFile fileName =
     let line = {original = input_line channel; declarations = []} in
     lines := line :: !lines;
     loop ()
-    [@@raises End_of_file]
+      [@@raises End_of_file]
   in
   try loop ()
   with End_of_file ->
@@ -122,9 +122,9 @@ let getLineAnnotation ~decl ~line =
           posAnnotation.pos_cnum - posAnnotation.pos_bol + offset )
       ~text:
         (if decl.posAdjustment = FirstVariant then
-         (* avoid syntax error *)
-         "| @dead "
-        else "@dead ")
+           (* avoid syntax error *)
+           "| @dead "
+         else "@dead ")
       ~action:"Suppress dead code warning"
   else
     Format.asprintf "@.  <-- line %d@.  %s" decl.pos.pos_lnum
diff --git a/analysis/src/ProcessExtra.ml b/analysis/src/ProcessExtra.ml
index e0a90d656..e153c76cb 100644
--- a/analysis/src/ProcessExtra.ml
+++ b/analysis/src/ProcessExtra.ml
@@ -9,8 +9,8 @@ let addReference ~extra stamp loc =
     (loc
     ::
     (if Hashtbl.mem extra.internalReferences stamp then
-     Hashtbl.find extra.internalReferences stamp
-    else []))
+       Hashtbl.find extra.internalReferences stamp
+     else []))
 
 let extraForFile ~(file : File.t) =
   let extra = initExtra () in
@@ -66,8 +66,8 @@ let addExternalReference ~extra moduleName path tip loc =
     ((path, tip, loc)
     ::
     (if Hashtbl.mem extra.externalReferences moduleName then
-     Hashtbl.find extra.externalReferences moduleName
-    else []))
+       Hashtbl.find extra.externalReferences moduleName
+     else []))
 
 let addFileReference ~extra moduleName loc =
   let newLocs =
diff --git a/analysis/src/References.ml b/analysis/src/References.ml
index e19439a20..e047a2ba1 100644
--- a/analysis/src/References.ml
+++ b/analysis/src/References.ml
@@ -66,7 +66,7 @@ let getLocItem ~full ~pos ~debug =
   | [
    ({locType = Typed (_, _, LocalReference _)} as li1);
    ({locType = Typed (_, _, GlobalReference ("Js_OO", ["unsafe_downgrade"], _))}
-   as li2);
+    as li2);
    li3;
   ]
   (* For older compiler 9.0 or earlier *)
diff --git a/analysis/src/Scope.ml b/analysis/src/Scope.ml
index 54a6de558..0e092d2a4 100644
--- a/analysis/src/Scope.ml
+++ b/analysis/src/Scope.ml
@@ -14,7 +14,7 @@ let itemToString item =
   | Module (s, loc) -> "Module " ^ s ^ " " ^ Loc.toString loc
   | Value (s, loc, _, _) -> "Value " ^ s ^ " " ^ Loc.toString loc
   | Type (s, loc) -> "Type " ^ s ^ " " ^ Loc.toString loc
-  [@@live]
+[@@live]
 
 let create () : t = []
 let addConstructor ~name ~loc x = Constructor (name, loc) :: x
@@ -24,12 +24,12 @@ let addOpen ~lid x = Open (Utils.flattenLongIdent lid @ ["place holder"]) :: x
 let addValue ~name ~loc ?contextPath x =
   let showDebug = !Cfg.debugFollowCtxPath in
   (if showDebug then
-   match contextPath with
-   | None -> Printf.printf "adding value '%s', no ctxPath\n" name
-   | Some contextPath ->
-     if showDebug then
-       Printf.printf "adding value '%s' with ctxPath: %s\n" name
-         (SharedTypes.Completable.contextPathToString contextPath));
+     match contextPath with
+     | None -> Printf.printf "adding value '%s', no ctxPath\n" name
+     | Some contextPath ->
+       if showDebug then
+         Printf.printf "adding value '%s' with ctxPath: %s\n" name
+           (SharedTypes.Completable.contextPathToString contextPath));
   Value (name, loc, contextPath, x) :: x
 let addType ~name ~loc x = Type (name, loc) :: x
 
diff --git a/tools/bin/version.ml b/tools/bin/version.ml
index d70940e28..8a00911bb 100644
--- a/tools/bin/version.ml
+++ b/tools/bin/version.ml
@@ -1 +1 @@
-let version = "0.6.4"
\ No newline at end of file
+let version = "0.6.4"