diff --git a/biome.json b/biome.json
index 68614e8..ea44975 100644
--- a/biome.json
+++ b/biome.json
@@ -135,6 +135,18 @@
   "files": {
     "includes": ["**/*.ts", "**/*.js", "**/*.json", "**/*.html", "!dist"]
   },
+  "overrides": [
+    {
+      "includes": ["src/**"],
+      "linter": {
+        "rules": {
+          "nursery": {
+            "useExplicitType": "off"
+          }
+        }
+      }
+    }
+  ],
   "javascript": {
     "formatter": {
       "quoteStyle": "double",
diff --git a/scripts/bouncingBallToSVG.ts b/scripts/bouncingBallToSVG.ts
index e21a2c7..7769786 100644
--- a/scripts/bouncingBallToSVG.ts
+++ b/scripts/bouncingBallToSVG.ts
@@ -105,8 +105,8 @@ ${circles}
 </svg>`;
 }
 
-const points = computeSnapshots();
-const svg = buildSvg(points);
+const points: Point[] = computeSnapshots();
+const svg: string = buildSvg(points);
 
 // Write to public/icons/icon.svg (source for PNG icon generation)
 const outputPath = "public/icons/icon.svg";
diff --git a/scripts/generate-icons.ts b/scripts/generate-icons.ts
index cbdd734..7f8adc0 100644
--- a/scripts/generate-icons.ts
+++ b/scripts/generate-icons.ts
@@ -4,12 +4,12 @@ import { fileURLToPath } from "node:url";
 import pngToIco from "png-to-ico";
 import sharp from "sharp";
 
-const Dirname = dirname(fileURLToPath(import.meta.url));
-const root = resolve(Dirname, "..");
+const Dirname: string = dirname(fileURLToPath(import.meta.url));
+const root: string = resolve(Dirname, "..");
 
-const svgBuffer = readFileSync(resolve(root, "public/icons/icon.svg"));
+const svgBuffer: Buffer = readFileSync(resolve(root, "public/icons/icon.svg"));
 
-const pngIcons = [
+const pngIcons: Array<{ name: string; size: number }> = [
   { name: "icons/apple-touch-icon.png", size: 180 },
   { name: "icons/icon-192.png", size: 192 },
   { name: "icons/icon-512.png", size: 512 },
@@ -22,7 +22,7 @@ for (const { name, size } of pngIcons) {
 }
 
 // Generate multi-size favicon.ico (16, 32, 48, 64)
-const faviconSizes = [16, 32, 48, 64];
+const faviconSizes: number[] = [16, 32, 48, 64];
 const faviconPngs: Buffer[] = [];
 
 for (const size of faviconSizes) {
@@ -30,6 +30,6 @@ for (const size of faviconSizes) {
   faviconPngs.push(pngBuffer);
 }
 
-const icoBuffer = await pngToIco(faviconPngs);
-const faviconDest = resolve(root, "public", "favicon.ico");
+const icoBuffer: Buffer = await pngToIco(faviconPngs);
+const faviconDest: string = resolve(root, "public", "favicon.ico");
 writeFileSync(faviconDest, icoBuffer);