diff --git a/deno.json b/deno.json
index dfe8a4bc4..9e652829b 100644
--- a/deno.json
+++ b/deno.json
@@ -1,6 +1,6 @@
 {
   "tasks": {
-    "build": "cp LICENSE js/LICENSE && deno run --unstable -A --no-check https://deno.land/x/wasmbuild@0.15.1/main.ts --no-default-features --project deno_graph_wasm --out js",
+    "build": "cp LICENSE js/LICENSE && deno run -A --no-check https://deno.land/x/wasmbuild@0.15.1/main.ts --no-default-features --project deno_graph_wasm --out js",
     "build:npm": "deno run -A _build_npm.ts",
     "test": "deno test --allow-read --allow-net"
   },
diff --git a/js/mod.ts b/js/mod.ts
index 4435c166a..38266446d 100644
--- a/js/mod.ts
+++ b/js/mod.ts
@@ -192,7 +192,7 @@ export async function init(opts?: wasm.InstantiateOptions) {
  */
 export function parseModule(
   specifier: string,
-  content: string,
+  content: Uint8Array,
   options: ParseModuleOptions = {},
 ): ModuleJson {
   const {
diff --git a/js/test.ts b/js/test.ts
index 32b015277..fea01259c 100644
--- a/js/test.ts
+++ b/js/test.ts
@@ -538,13 +538,13 @@ Deno.test({
     await init();
     const module = parseModule(
       "file:///a/test01.js",
-      `
+      new TextEncoder().encode(`
         /// <reference types="./test01.d.ts" />
         import { a } from "./a.ts";
         import * as b from "./b.ts";
         export { c } from "./c.ts";
         const d = await import("./d.ts");
-      `,
+      `),
     );
     assertEquals(module, {
       "specifier": "file:///a/test01.js",
@@ -609,9 +609,9 @@ Deno.test({
     await init();
     const module = parseModule(
       `https://example.com/a`,
-      `declare interface A {
+      new TextEncoder().encode(`declare interface A {
       a: string;
-    }`,
+    }`),
       {
         headers: {
           "content-type": "application/typescript; charset=utf-8",
@@ -628,10 +628,10 @@ Deno.test({
     await init();
     const module = parseModule(
       `file:///a/test01.tsx`,
-      `/* @jsxImportSource http://example.com/preact */
+      new TextEncoder().encode(`/* @jsxImportSource http://example.com/preact */
     export function A() {
       <div>Hello Deno</div>
-    }`,
+    }`),
       {
         jsxImportSourceModule: "jsx-dev-runtime",
       },
@@ -651,10 +651,10 @@ Deno.test({
     await init();
     const module = parseModule(
       `file:///a/test01.tsx`,
-      `
+      new TextEncoder().encode(`
     export function A() {
       <div>Hello Deno</div>
-    }`,
+    }`),
       {
         defaultJsxImportSource: "http://example.com/preact",
       },
@@ -673,7 +673,7 @@ Deno.test({
     await init();
     assertThrows(
       () => {
-        parseModule("./bad.ts", `console.log("hello");`);
+        parseModule("./bad.ts", new TextEncoder().encode(`console.log("hello");`));
       },
       Error,
       "relative URL without a base",
@@ -687,7 +687,7 @@ Deno.test({
     await init();
     assertThrows(
       () => {
-        parseModule("file:///a/test.md", `# Some Markdown\n\n**bold**`);
+        parseModule("file:///a/test.md", new TextEncoder().encode(`# Some Markdown\n\n**bold**`));
       },
       Error,
       "The module's source code could not be parsed",
@@ -701,10 +701,10 @@ Deno.test({
     await init();
     const module = parseModule(
       "file:///a/test01.js",
-      `
+      new TextEncoder().encode(`
         import a from "./a.json" with { type: "json" };
         await import("./b.json", { with: { type: "json" } });
-      `,
+      `),
     );
     assertEquals(module, {
       "dependencies": [
@@ -758,10 +758,10 @@ Deno.test({
     await init();
     const module = parseModule(
       "file:///a/foo.ts",
-      `
+      new TextEncoder().encode(`
         /// <reference path="./a.d.ts" />
         /// <reference types="./b.d.ts" />
-      `,
+      `),
     );
     assertEquals(module, {
       "dependencies": [