diff --git a/packages/demo/webpack.config.ts b/packages/demo/webpack.config.ts
index 2ffe1a8..985f69f 100644
--- a/packages/demo/webpack.config.ts
+++ b/packages/demo/webpack.config.ts
@@ -1,6 +1,5 @@
-import * as path from "path";
-// @ts-ignore
-import * as HtmlWebpackPlugin from "html-webpack-plugin";
+import path from "path";
+import HtmlWebpackPlugin from "html-webpack-plugin";
 
 import type { Configuration } from "webpack";
 
diff --git a/packages/gif-creator/index.ts b/packages/gif-creator/index.ts
index f6854c4..17a0d57 100644
--- a/packages/gif-creator/index.ts
+++ b/packages/gif-creator/index.ts
@@ -1,5 +1,5 @@
-import * as fs from "fs";
-import * as path from "path";
+import fs from "fs";
+import path from "path";
 import { createCanvas } from "canvas";
 import { Grid, copyGrid, Color } from "@snk/types/grid";
 import { Snake } from "@snk/types/snake";
@@ -9,8 +9,8 @@ import {
   getCanvasWorldSize,
 } from "@snk/draw/drawWorld";
 import { step } from "@snk/compute/step";
-import * as tmp from "tmp";
-import * as execa from "execa";
+import tmp from "tmp";
+import execa from "execa";
 
 const withTmpDir = async <T>(
   handler: (dir: string) => Promise<T>
diff --git a/packages/types/__fixtures__/grid.ts b/packages/types/__fixtures__/grid.ts
index 72389eb..d9d99cf 100644
--- a/packages/types/__fixtures__/grid.ts
+++ b/packages/types/__fixtures__/grid.ts
@@ -1,5 +1,4 @@
-// @ts-ignore
-import * as ParkMiller from "park-miller";
+import ParkMiller from "park-miller";
 import { Color, createEmptyGrid, setColor } from "../grid";
 import { randomlyFillGrid } from "../randomlyFillGrid";
 
@@ -64,14 +63,32 @@ setColor(enclaveK, 3, 5, 3 as Color);
 setColor(enclaveK, 1, 5, 3 as Color);
 setColor(enclaveK, 2, 2, 1 as Color);
 
+export const enclaveU = createEmptyGrid(17, 9);
+setColor(enclaveU, 1, 1, 3 as Color);
+setColor(enclaveU, 2, 1, 3 as Color);
+setColor(enclaveU, 3, 1, 3 as Color);
+setColor(enclaveU, 0, 1, 3 as Color);
+setColor(enclaveU, 0, 2, 3 as Color);
+setColor(enclaveU, 0, 3, 3 as Color);
+setColor(enclaveU, 3, 1, 3 as Color);
+setColor(enclaveU, 3, 2, 3 as Color);
+setColor(enclaveU, 3, 3, 3 as Color);
+setColor(enclaveU, 1, 4, 3 as Color);
+setColor(enclaveU, 3, 4, 3 as Color);
+setColor(enclaveU, 3, 5, 3 as Color);
+setColor(enclaveU, 1, 5, 3 as Color);
+setColor(enclaveU, 2, 2, 1 as Color);
+setColor(enclaveU, 1, 2, 1 as Color);
+setColor(enclaveU, 2, 3, 1 as Color);
+setColor(enclaveU, 1, 3, 1 as Color);
+setColor(enclaveU, 2, 4, 1 as Color);
+setColor(enclaveU, 16, 8, 1 as Color);
+
 const create = (width: number, height: number, emptyP: number) => {
   const grid = createEmptyGrid(width, height);
-  const random = new ParkMiller(10);
-  randomlyFillGrid(
-    grid,
-    { colors, emptyP },
-    random.integerInRange.bind(random)
-  );
+  const pm = new ParkMiller(10);
+  const random = pm.integerInRange.bind(pm);
+  randomlyFillGrid(grid, { colors, emptyP }, random);
   return grid;
 };
 
diff --git a/tsconfig.json b/tsconfig.json
index a6dc2f0..324cfb4 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,7 +5,8 @@
     "skipLibCheck": true,
     "noUnusedLocals": true,
     "noUnusedParameters": true,
-    "forceConsistentCasingInFileNames": true
+    "forceConsistentCasingInFileNames": true,
+    "esModuleInterop": true
   },
   "exclude": ["node_modules"]
 }