diff --git a/bun.lockb b/bun.lockb
index 7b2c469..6c70597 100755
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/package.json b/package.json
index 1953b46..2c81aae 100644
--- a/package.json
+++ b/package.json
@@ -7,14 +7,15 @@
   "main": "dist/index.cjs",
   "module": "dist/index.esm.js",
   "types": "dist/index.d.ts",
+  "type": "module",
   "sideEffects": false,
   "private": false,
   "license": "Apache-2.0",
   "devDependencies": {
     "prettier": "^3.3.1",
-    "rollup": "^1.23.1",
-    "rollup-plugin-typescript2": "^0.24.3",
-    "typescript": "^3.6.3",
+    "rollup": "^4.18.0",
+    "rollup-plugin-typescript2": "^0.36.0",
+    "typescript": "^5.4.5",
     "vitest": "^1.6.0"
   },
   "bugs": {
@@ -32,9 +33,7 @@
   ],
   "scripts": {
     "test": "vitest",
-    "build:tsd": "rm -rf dist && tsc src/index.ts --emitDeclarationOnly -d --outDir dist",
-    "rollup": "rollup -c",
-    "build": "bun run build:tsd && bun run rollup",
+    "build": "bun run rollup -c",
     "deploy": "bun run build && bun run publish",
     "pretty": "prettier --check 'src/**/*.ts'",
     "pretty-fix": "prettier --write 'src/**/*.ts'"
diff --git a/rollup.config.js b/rollup.config.js
index b01aed1..db7d0c4 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -1,24 +1,19 @@
-import typescript from 'rollup-plugin-typescript2'
-import { RollupOptions } from "rollup";
+import typescriptPlugin from "rollup-plugin-typescript2"
+import typescript from "typescript"
 
-/** @type {RollupOptions} */
 export default {
-  input: 'src/index.ts',
+  input: "src/index.ts",
   output: [
     {
-      name: 'pratica',
-      format: 'cjs',
-      file: 'dist/index.cjs'
+      name: "pratica",
+      format: "cjs",
+      file: "dist/index.cjs",
     },
     {
-      name: 'pratica',
-      format: 'es',
-      file: 'dist/index.esm.js'
-    }
-  ],
-  plugins: [
-    typescript({
-      typescript: require('typescript'),
-    })
+      name: "pratica",
+      format: "es",
+      file: "dist/index.esm.js",
+    },
   ],
-} 
\ No newline at end of file
+  plugins: [typescriptPlugin({ typescript, tsconfig: "tsconfig.build.json" })],
+}
diff --git a/src/encase.ts b/src/encase.ts
index 7405106..fdaf66b 100644
--- a/src/encase.ts
+++ b/src/encase.ts
@@ -13,6 +13,6 @@ export const encaseRes = <A, E>(func: () => A): Result<A, E> => {
   try {
     return Ok<A>(func())
   } catch (e) {
-    return Err<E>(e)
+    return Err<E>(e as E)
   }
 }
diff --git a/src/parseDate.ts b/src/parseDate.ts
index 207af74..848a873 100644
--- a/src/parseDate.ts
+++ b/src/parseDate.ts
@@ -1,6 +1,6 @@
 import { nullable, Maybe, Nothing, Just } from "./maybe"
 
-export const parseDate = (date: string | number | Date | undefined | null): Maybe<Date> =>
+export const parseDate = (date: string | number | undefined | null): Maybe<Date> =>
   nullable(date)
     .map((d) => new Date(d))
     .chain((d) => (isNaN(d.valueOf()) ? Nothing : Just(d)))
diff --git a/tsconfig.build.json b/tsconfig.build.json
new file mode 100644
index 0000000..38700f4
--- /dev/null
+++ b/tsconfig.build.json
@@ -0,0 +1,25 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "useDefineForClassFields": true,
+    "module": "ES2020",
+    "lib": ["ES2020", "DOM", "DOM.Iterable"],
+    "skipLibCheck": true,
+    "declaration": true,
+    "outDir": "dist",
+
+    /* Bundler mode */
+    "moduleResolution": "Bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+
+    /* Linting */
+    "strict": true,
+    "noFallthroughCasesInSwitch": true,
+    "strictNullChecks": true,
+
+    /* Sourcemaps */
+    "sourceMap": true,
+  },
+  "include": ["src"]
+}
\ No newline at end of file
diff --git a/tsconfig.json b/tsconfig.json
index 86bd506..88a3f2e 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,16 +1,25 @@
 {
   "compilerOptions": {
-    "target": "es5",
-    "lib": ["dom", "dom.iterable", "esnext"],
+    "target": "ES2020",
+    "useDefineForClassFields": true,
+    "module": "ES2020",
+    "lib": ["ES2020", "DOM", "DOM.Iterable"],
     "skipLibCheck": true,
-    "esModuleInterop": true,
-    "allowSyntheticDefaultImports": true,
-    "strict": true,
-    "forceConsistentCasingInFileNames": true,
-    "module": "esnext",
-    "moduleResolution": "node",
+    "declaration": true,
+    "outDir": "dist",
+
+    /* Bundler mode */
+    "moduleResolution": "Bundler",
     "resolveJsonModule": true,
-    "noEmit": true
+    "isolatedModules": true,
+
+    /* Linting */
+    "strict": true,
+    "noFallthroughCasesInSwitch": true,
+    "strictNullChecks": true,
+
+    /* Sourcemaps */
+    "sourceMap": true,
   },
   "include": ["src", "specs"]
 }
\ No newline at end of file