diff --git a/_build.ts b/_build.ts
index 001eb5a..0d51bad 100644
--- a/_build.ts
+++ b/_build.ts
@@ -8,14 +8,13 @@ packageJson.version = Deno.args[0];
 await build({
   entryPoints: ["./index.ts"],
   outDir: "./npm",
-  test: false,
   scriptModule: false,
   compilerOptions: {
     target: "ES2021",
     sourceMap: true,
     inlineSources: true,
   },
-  shims: {},
+  shims: { deno: "dev" },
   package: packageJson,
   postBuild() {
     Deno.copyFileSync("LICENSE", "npm/LICENSE");
diff --git a/package.json b/package.json
index 3e0838f..5aadaf8 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,6 @@
   "name": "structurae",
   "version": "4.0.2",
   "main": "./esm/index.js",
-  "type": "module",
   "description": "Data structures for high-performance JavaScript applications.",
   "keywords": [
     "optimization",