diff --git a/craco.config.js b/craco.config.js
index 9d2219c9..dd1d624a 100644
--- a/craco.config.js
+++ b/craco.config.js
@@ -1,6 +1,11 @@
 // https://github.com/gsoft-inc/craco/blob/master/packages/craco/README.md#configuration
 
-const { getLoader, getLoaders, loaderByName } = require('@craco/craco');
+const {
+    addBeforeLoader,
+    getLoader,
+    getLoaders,
+    loaderByName,
+} = require('@craco/craco');
 
 module.exports = {
     webpack: {
@@ -45,6 +50,17 @@ module.exports = {
                         /\.json$/,
                     ];
 
+                    // work around default handling of .wasm files
+                    // https://github.com/webpack/webpack/issues/7352
+                    addBeforeLoader(webpackConfig, loaderByName('file-loader'), {
+                        test: /\.wasm$/,
+                        type: 'javascript/auto',
+                        loader: 'file-loader',
+                        options: {
+                            name: 'static/[name].[hash:8].[ext]',
+                        },
+                    });
+
                     return webpackConfig;
                 },
             },
diff --git a/package.json b/package.json
index 5e755238..f3324fd0 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,6 @@
         "zen-push": "^0.2.1"
     },
     "scripts": {
-        "prepare": "mkdirp public/static/js && ncp node_modules/@pybricks/mpy-cross-v5/build/mpy-cross.wasm src/sagas/mpy-cross.emcwasm",
         "start": "craco start",
         "build": "craco build",
         "test": "craco test --env=./test/env.js",
@@ -76,8 +75,6 @@
         "eslint-plugin-prettier": "^3.3.1",
         "eslint-plugin-react": "^7.22.0",
         "jest-mock-extended": "^1.0.9",
-        "mkdirp": "^1.0.4",
-        "ncp": "^2.0.0",
         "prettier": "^2.2.1"
     }
 }
diff --git a/src/react-app-env.d.ts b/src/react-app-env.d.ts
index 7830f648..e1cd6f56 100644
--- a/src/react-app-env.d.ts
+++ b/src/react-app-env.d.ts
@@ -5,7 +5,7 @@ declare module '*.json' {
     export default src;
 }
 
-declare module '*.emcwasm' {
+declare module '*.wasm' {
     const src: string;
     export default src;
 }
diff --git a/src/sagas/.gitignore b/src/sagas/.gitignore
deleted file mode 100644
index 57cbe67d..00000000
--- a/src/sagas/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-*.emcwasm
diff --git a/src/sagas/mpy.ts b/src/sagas/mpy.ts
index ed16c9bd..5c15c43d 100644
--- a/src/sagas/mpy.ts
+++ b/src/sagas/mpy.ts
@@ -2,6 +2,7 @@
 // Copyright (c) 2020 The Pybricks Authors
 
 import { CompileResult, compile as mpyCrossCompile } from '@pybricks/mpy-cross-v5';
+import wasm from '@pybricks/mpy-cross-v5/build/mpy-cross.wasm';
 import { call, put, takeEvery } from 'redux-saga/effects';
 import {
     MpyActionType,
@@ -9,7 +10,6 @@ import {
     didCompile,
     didFailToCompile,
 } from '../actions/mpy';
-import wasm from './mpy-cross.emcwasm';
 
 /**
  * Compiles a script to .mpy and dispatches either didCompile on success or
diff --git a/yarn.lock b/yarn.lock
index 1959be12..e530fa31 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8266,11 +8266,6 @@ natural-compare@^1.4.0:
   resolved "https://registry.yarnpkg.com/natural-compare/-/natural-compare-1.4.0.tgz#4abebfeed7541f2c27acfb29bdbbd15c8d5ba4f7"
   integrity sha1-Sr6/7tdUHywnrPspvbvRXI1bpPc=
 
-ncp@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/ncp/-/ncp-2.0.0.tgz#195a21d6c46e361d2fb1281ba38b91e9df7bdbb3"
-  integrity sha1-GVoh1sRuNh0vsSgbo4uR6d9727M=
-
 negotiator@0.6.2:
   version "0.6.2"
   resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.2.tgz#feacf7ccf525a77ae9634436a64883ffeca346fb"