diff --git a/README.md b/README.md
index 5c0ec01..c2eb888 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@ Easily define your API contract somewhere shared, for example, `Contract.res`:
 ```rescript
 let createPost = Rest.route(() => {
   path: "/posts",
-  method: "POST",
+  method: Post,
   variables: s => {
     "title": s.field("title", S.string),
     "body": s.field("body", S.string),
@@ -57,7 +57,7 @@ let createPost = Rest.route(() => {
 
 let getPosts = Rest.route(() => {
   path: "/posts",
-  method: "GET",
+  method: Get,
   variables: s => {
     "skip": s.query("skip", S.int),
     "take": s.query("take", S.int),
@@ -114,7 +114,7 @@ You can define path parameters by adding them to the `path` strin with a curly b
 ```rescript
 let getPost = Rest.route(() => {
   path: "/api/author/{authorId}/posts/{id}",
-  method: "GET",
+  method: Get,
   variables: s => {
     "authorId": s.param("authorId", S.string->S.uuid),
     "id": s.param("id", S.int),
@@ -142,7 +142,7 @@ You can add query parameters to the request by using the `s.query` method in the
 ```rescript
 let getPosts = Rest.route(() => {
   path: "/posts",
-  method: "GET",
+  method: Get,
   variables: s => {
     "skip": s.query("skip", S.int),
     "take": s.query("take", S.int),
@@ -170,7 +170,7 @@ You can add headers to the request by using the `s.header` method in the `variab
 ```rescript
 let getPosts = Rest.route(() => {
   path: "/posts",
-  method: "GET",
+  method: Get,
   variables: s => {
     "authorization": s.header("authorization", S.string),
     "pagination": s.header("pagination", S.option(S.int)),
@@ -188,7 +188,7 @@ Responses are described as an array of response definitions. It's possible to as
 ```rescript
 let createPost = Rest.route(() => {
   path: "/posts",
-  method: "POST",
+  method: Post,
   variables: _ => (),
   responses: [
     s => {
@@ -208,7 +208,7 @@ You can use `s.status` multiple times. To define a range of response statuses, y
 ```rescript
 let createPost = Rest.route(() => {
   path: "/posts",
-  method: "POST",
+  method: Post,
   variables: _ => (),
   responses: [
     s => {
@@ -245,7 +245,7 @@ You can define custom headers in a response as follows:
 ```rescript
 let ping = Rest.route(() => {
   path: "/ping",
-  method: "GET",
+  method: Get,
   summary: "Checks if the server is alive",
   variables: _ => (),
   responses: [
diff --git a/__tests__/Rest_path_test.res b/__tests__/Rest_path_test.res
index 513623a..eba5f81 100644
--- a/__tests__/Rest_path_test.res
+++ b/__tests__/Rest_path_test.res
@@ -12,7 +12,7 @@ asyncTest("Fails with path parameter not defined in variables", async t => {
 
   let createGame = Rest.route(() => {
     path: "/game/{gameId}",
-    method: "POST",
+    method: Post,
     variables: _ => (),
     responses: [
       s => {
@@ -37,7 +37,7 @@ asyncTest("Fails with path parameter not defined in the path string", async t =>
 
   let createGame = Rest.route(() => {
     path: "/game",
-    method: "POST",
+    method: Post,
     variables: s => s.param("gameId", S.string),
     responses: [
       s => {
@@ -62,7 +62,7 @@ asyncTest("Fails with empty path parameter name", async t => {
 
   let createGame = Rest.route(() => {
     path: "/game/{}",
-    method: "POST",
+    method: Post,
     variables: s => s.param("", S.string),
     responses: [
       s => {
@@ -87,7 +87,7 @@ asyncTest("Fails with path parameter missing closing curly bracket", async t =>
 
   let createGame = Rest.route(() => {
     path: "/game/{gameId",
-    method: "POST",
+    method: Post,
     variables: s => s.param("", S.string),
     responses: [
       s => {
@@ -112,7 +112,7 @@ asyncTest("Fails with path parameter missing opening curly bracket", async t =>
 
   let createGame = Rest.route(() => {
     path: "/game/gameId}",
-    method: "POST",
+    method: Post,
     variables: s => s.param("gameId", S.string),
     responses: [
       s => {
@@ -137,7 +137,7 @@ asyncTest("Fails with path parameter switched open and close curly bracket", asy
 
   let createGame = Rest.route(() => {
     path: "/game/}gameId{",
-    method: "POST",
+    method: Post,
     variables: s => s.param("gameId", S.string),
     responses: [
       s => {
diff --git a/__tests__/Rest_test.res b/__tests__/Rest_test.res
index fcc1f73..f0eed61 100644
--- a/__tests__/Rest_test.res
+++ b/__tests__/Rest_test.res
@@ -25,7 +25,7 @@ asyncTest("Test simple POST request", async t => {
 
   let createGame = Rest.route(() => {
     path: "/game",
-    method: "POST",
+    method: Post,
     variables: s => s.body(userSchema),
     responses: [
       s => {
@@ -62,7 +62,7 @@ asyncTest("Test request with mixed body and header data", async t => {
 
   let createGame = Rest.route(() => {
     path: "/game",
-    method: "POST",
+    method: Post,
     variables: s =>
       {
         "userName": s.field("user_name", S.string),
@@ -105,7 +105,7 @@ asyncTest("Test simple GET request", async t => {
 
   let getHeight = Rest.route(() => {
     path: "/height",
-    method: "GET",
+    method: Get,
     variables: _ => (),
     responses: [
       s => {
@@ -123,7 +123,7 @@ asyncTest("Test simple GET request", async t => {
 asyncTest("Test query params encoding to path", async t => {
   let getHeight = Rest.route(() => {
     path: "/height",
-    method: "GET",
+    method: Get,
     variables: s =>
       {
         "string": s.query("string", S.string),
@@ -263,7 +263,7 @@ asyncTest("Example test", async t => {
 
   let createPost = Rest.route(() => {
     path: "/posts",
-    method: "POST",
+    method: Post,
     variables: s =>
       {
         "title": s.field("title", S.string),
@@ -279,7 +279,7 @@ asyncTest("Example test", async t => {
 
   let getPosts = Rest.route(() => {
     path: "/posts",
-    method: "GET",
+    method: Get,
     variables: s =>
       {
         "skip": s.query("skip", S.int),
@@ -352,7 +352,7 @@ asyncTest("Multiple path params", async t => {
 
   let getSubComment = Rest.route(() => {
     path: "/post/{id}/comments/{commentId}/{commentId2}",
-    method: "GET",
+    method: Get,
     variables: s =>
       {
         "id": s.param("id", S.string),
@@ -392,7 +392,7 @@ asyncTest("Fails to register two default responses", async t => {
 
   let getHeight = Rest.route(() => {
     path: "/height",
-    method: "GET",
+    method: Get,
     variables: _ => (),
     responses: [
       s => {
@@ -424,7 +424,7 @@ asyncTest("Fails when response is not registered", async t => {
 
   let getHeight = Rest.route(() => {
     path: "/height",
-    method: "GET",
+    method: Get,
     variables: _ => (),
     responses: [],
   })
@@ -447,7 +447,7 @@ asyncTest("Uses default response when explicit status is not defined", async t =
 
   let getHeight = Rest.route(() => {
     path: "/height",
-    method: "GET",
+    method: Get,
     variables: _ => (),
     responses: [
       s => {
@@ -473,7 +473,7 @@ asyncTest("Uses 2XX response when explicit status is not defined", async t => {
 
   let getHeight = Rest.route(() => {
     path: "/height",
-    method: "GET",
+    method: Get,
     variables: _ => (),
     responses: [
       s => {
@@ -500,7 +500,7 @@ asyncTest("Fails with an invalid response data", async t => {
 
   let getHeight = Rest.route(() => {
     path: "/height",
-    method: "GET",
+    method: Get,
     variables: _ => (),
     responses: [
       s => {
diff --git a/src/Rest.res b/src/Rest.res
index 27575e2..2fa846e 100644
--- a/src/Rest.res
+++ b/src/Rest.res
@@ -251,8 +251,10 @@ type s = {
   param: 'value. (string, S.t<'value>) => 'value,
 }
 
+type method = |@as("GET") Get | @as("POST") Post | @as("PUT") Put | @as("PATCH") Patch | @as("DELETE") Delete | @as("HEAD") Head | @as("OPTIONS") Options | @as("TRACE") Trace
+
 type definition<'variables, 'response> = {
-  method: string,
+  method: method,
   path: string,
   variables: s => 'variables,
   responses: array<Response.s => 'response>,
@@ -504,7 +506,7 @@ let client = (~baseUrl, ~fetcher=ApiFetcher.default, ~jsonQuery=false) => {
           ~maybeParams=data["params"],
           ~jsonQuery,
         ),
-        method: definition.method,
+        method: (definition.method :> string),
       })->Promise.thenResolve(fetcherResponse => {
         switch responses->Response.find(fetcherResponse.status) {
         | None =>
diff --git a/src/Rest.resi b/src/Rest.resi
index 011e1a8..804b425 100644
--- a/src/Rest.resi
+++ b/src/Rest.resi
@@ -100,8 +100,18 @@ type s = {
   param: 'value. (string, S.t<'value>) => 'value,
 }
 
+type method =
+  | @as("GET") Get
+  | @as("POST") Post
+  | @as("PUT") Put
+  | @as("PATCH") Patch
+  | @as("DELETE") Delete
+  | @as("HEAD") Head
+  | @as("OPTIONS") Options
+  | @as("TRACE") Trace
+
 type definition<'variables, 'response> = {
-  method: string,
+  method: method,
   path: string,
   variables: s => 'variables,
   responses: array<Response.s => 'response>,