diff --git a/src/Puppeteer.Page.HTTP.Request.js b/src/Puppeteer.Page.HTTP.Request.js
index 0b0d8e2..b9776ce 100644
--- a/src/Puppeteer.Page.HTTP.Request.js
+++ b/src/Puppeteer.Page.HTTP.Request.js
@@ -2,71 +2,63 @@ import { HTTPResponse } from 'puppeteer'
 import { HTTPRequest } from 'puppeteer'
 
 /**
- * `foreign import _abort :: String -> Request -> Promise Unit`
  * @type {(_0: import("puppeteer").ErrorCode) => (_1: HTTPRequest) => () => Promise<void>}
  */
 export const _abort = e => r => () => r.abort(e)
 
 /**
- * `foreign import _continue :: Foreign -> Request -> Promise Unit`
  * @type {(_0: import("puppeteer").ContinueRequestOverrides) => (_1: HTTPRequest) => () => Promise<void>}
  */
 export const _continue = o => r => () => r.continue(o)
 
 /**
- * `foreign import _respond :: RespondToRequest -> Request -> Promise Unit`
  * @type {(_0: import("puppeteer").ResponseForRequest) => (_1: HTTPRequest) => () => Promise<void>}
  */
 export const _respond = rep => req => () => req.respond(rep)
 
 /**
- * `foreign import _failure :: Request -> Effect (Nullable {errorText :: String})`
  * @type {(_1: HTTPRequest) => () => {errorText: string} | null}
  */
 export const _failure = r => () => r.failure()
 
 /**
- * `foreign import headers :: Request -> Effect (Map String String)`
- * @type {(_1: HTTPRequest) => () => Map<string, string>}
+ * @type {(_1: HTTPRequest) => () => Array<{k: string, v: string}>}
  */
-export const headers = r => () =>
-  Object.entries(r.headers()).reduce((map, [k, v]) => {
-    map.set(k, v)
-    return map
-  }, new Map())
+export const headers = r => () => {
+  /** @type {Array<{k: string, v: string}>} */
+  const init = []
+  return Object.entries(r.headers()).reduce(
+    (map, [k, v]) => [...map, { k, v }],
+    init,
+  )
+}
 
 /**
- * `foreign import _isNavigation :: Request -> Effect Boolean`
  * @type {(_1: HTTPRequest) => () => boolean}
  */
 export const isNavigation = r => () => r.isNavigationRequest()
 
 /**
- * `foreign import _method :: Request -> Effect String`
  * @type {(_1: HTTPRequest) => () => string}
  */
 export const method = r => () => r.method()
 
 /**
- * `foreign import _postData :: Request -> Effect Foreign`
  * @type {(_1: HTTPRequest) => () => string | undefined}
  */
 export const _postData = r => () => r.postData()
 
 /**
- * `foreign import _resourceType :: Request -> Effect String`
  * @type {(_1: HTTPRequest) => () => string}
  */
 export const resourceType = r => () => r.resourceType()
 
 /**
- * `foreign import _url :: Request -> Effect String`
  * @type {(_1: HTTPRequest) => () => string}
  */
 export const url = r => () => r.url()
 
 /**
- * `foreign import _response :: Request -> Effect (Nullable Response)`
  * @type {(_1: HTTPRequest) => () => HTTPResponse | null}
  */
 export const _response = r => () => r.response()
diff --git a/src/Puppeteer.Page.HTTP.Request.purs b/src/Puppeteer.Page.HTTP.Request.purs
index 6a89bf6..d213de4 100644
--- a/src/Puppeteer.Page.HTTP.Request.purs
+++ b/src/Puppeteer.Page.HTTP.Request.purs
@@ -9,6 +9,11 @@ module Puppeteer.HTTP.Request
   , failure
   , postData
   , response
+  , headers
+  , isNavigation
+  , method
+  , resourceType
+  , url
   ) where
 
 import Prelude
@@ -67,7 +72,6 @@ prepareContinueRequestOverrides { headers: headers', method: method', postData:
   , url: FFI.maybeToUndefined url'
   }
 
-foreign import headers :: Request -> Effect (Map String String)
 foreign import isNavigation :: Request -> Effect Boolean
 foreign import method :: Request -> Effect String
 foreign import resourceType :: Request -> Effect String
@@ -77,10 +81,14 @@ foreign import _abort :: String -> Request -> Promise Unit
 foreign import _continue :: Foreign -> Request -> Promise Unit
 foreign import _respond :: Foreign -> Request -> Promise Unit
 
+foreign import _headers :: Request -> Effect (Array {k :: String, v :: String})
 foreign import _failure :: Request -> Effect (Nullable { errorText :: String })
 foreign import _postData :: Request -> Effect Foreign
 foreign import _response :: Request -> Effect (Nullable Response)
 
+headers :: Request -> Effect (Map String String)
+headers = map FFI.makeMap <<< _headers
+
 abort :: Context InterceptRequestsHint -> ErrorCode -> Request -> Aff Unit
 abort _ e = Promise.toAff <<< _abort (errorCodeString e)