diff --git a/package.json b/package.json
index f50b208..fb1dadf 100644
--- a/package.json
+++ b/package.json
@@ -47,20 +47,20 @@
     "split2": "^4.2.0"
   },
   "devDependencies": {
-    "@cowtech/eslint-config": "^8.10.0",
-    "@swc/cli": "^0.1.62",
-    "@swc/core": "^1.3.94",
-    "@types/node": "^20.8.7",
-    "@types/pump": "^1.1.2",
-    "@types/split2": "^4.2.2",
-    "@types/tap": "^15.0.10",
+    "@cowtech/eslint-config": "^9.0.0",
+    "@swc/cli": "^0.1.63",
+    "@swc/core": "^1.3.101",
+    "@types/node": "^20.10.5",
+    "@types/pump": "^1.1.3",
+    "@types/split2": "^4.2.3",
+    "@types/tap": "^15.0.11",
     "c8": "^8.0.1",
     "chokidar": "^3.5.3",
     "concurrently": "^8.2.2",
-    "prettier": "^3.0.3",
-    "tap": "^18.5.2",
-    "ts-node": "^10.9.1",
-    "typescript": "^5.2.2"
+    "prettier": "^3.1.1",
+    "tap": "^18.6.1",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.3.3"
   },
   "engines": {
     "node": ">= 18.18.0"
diff --git a/src/index.ts b/src/index.ts
index e7f1160..3420ea1 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -10,6 +10,7 @@ function parseOptionAsync(promises: Promise<void>[], fn: (...args: any[]) => Pro
   const [promise, resolve, reject] = createPromiseForCallbacks()
 
   promises.push(promise)
+  // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
   fn(...args)
     .then(resolve)
     .catch(reject)
@@ -41,7 +42,7 @@ export async function processData(
         contents += chunk.toString(encoding)
       }
     } catch (error) {
-      handleError(error, input)
+      handleError(error as Error, input)
     }
 
     return executeCommands(contents, 0, commands)
@@ -77,7 +78,7 @@ export async function processData(
     // Start processing
     pipe.resume()
   }).catch(error => {
-    handleError(error, input)
+    handleError(error as Error, input)
   })
 }
 
@@ -126,8 +127,8 @@ export async function execute(args: string[], { version, description }: PackageI
   const { input, encoding, whole } = cli.opts()
 
   try {
-    await processData(input, encoding, whole, commands)
+    await processData(input as string, encoding as BufferEncoding, whole as boolean, commands)
   } catch (error) {
-    handleError(error, input, true)
+    handleError(error as Error, input as string, true)
   }
 }
diff --git a/test/index.test.ts b/test/index.test.ts
index 64dde6d..08a5e32 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -3,10 +3,10 @@
 import { readFileSync } from 'node:fs'
 import t from 'tap'
 import { execute, processData } from '../src/index.js'
-import { NSedError } from '../src/models.js'
+import { NSedError, type PackageInfo } from '../src/models.js'
 import { requireModule } from '../src/operations.js'
 
-const packageInfo = JSON.parse(readFileSync(new URL('../package.json', import.meta.url), 'utf8'))
+const packageInfo: PackageInfo = JSON.parse(readFileSync(new URL('../package.json', import.meta.url), 'utf8'))
 const dataFile = new URL('fixtures/data.txt', import.meta.url).toString().replace('file://', '')
 
 t.test('NSed execution', async t => {