diff --git a/package.json b/package.json
index 9720f15..f8ebe72 100644
--- a/package.json
+++ b/package.json
@@ -36,4 +36,4 @@
     "vitest": "^0.34.6",
     "yargs-parser": "^21.1.1"
   }
-}
+}
\ No newline at end of file
diff --git a/src/github.js b/src/github.js
deleted file mode 100644
index acf55b5..0000000
--- a/src/github.js
+++ /dev/null
@@ -1,37 +0,0 @@
-import fetch from 'node-fetch'
-
-async function api(endpoint) {
-  const response = await fetch(`https://api.github.com/repos/${endpoint}`)
-  return await response.json()
-}
-
-// Great for downloads with few sub directories on big repos
-// Cons: many requests if the repo has a lot of nested dirs
-export async function viaContentsApi({
-  user,
-  repository,
-  ref = 'HEAD',
-  directory,
-  getFullData = false,
-}) {
-  const files = []
-  const contents = await api(`${user}/${repository}/contents/${directory}?ref=${ref}`)
-
-  if (contents.message === 'Not Found') {
-    return []
-  }
-
-  if (contents.message) {
-    throw new Error(contents.message)
-  }
-
-  for (const item of contents) {
-    if (item.type === 'file') {
-      files.push(getFullData ? item : item.path)
-    } else if (item.type === 'dir') {
-      files.push(getFullData ? item : item.path)
-    }
-  }
-
-  return files
-}
diff --git a/src/github.ts b/src/github.ts
new file mode 100644
index 0000000..6093bed
--- /dev/null
+++ b/src/github.ts
@@ -0,0 +1,49 @@
+import fetch from 'node-fetch'
+
+const api = async (endpoint: string) => {
+  const response = await fetch(`https://api.github.com/repos/${endpoint}`)
+  const contents = (await response.json()) as
+    | { message: string }
+    | { type: string; path: string }[]
+  return contents
+}
+
+type Options = {
+  user: string
+  repository: string
+  ref: string
+  directory: string
+}
+
+export const viaContentsApi = async ({
+  user,
+  repository,
+  ref = 'HEAD',
+  directory,
+}: Options) => {
+  const files = []
+  const contents = await api(
+    `${user}/${repository}/contents/${directory}?ref=${ref}`
+  )
+
+  if ('message' in contents) {
+    if (contents.message === 'Not Found') {
+      return []
+    }
+    if (contents.message) {
+      throw new Error(contents.message)
+    }
+  }
+
+  if (Array.isArray(contents)) {
+    for (const item of contents) {
+      if (item.type === 'file') {
+        files.push(item.path)
+      } else if (item.type === 'dir') {
+        files.push(item.path)
+      }
+    }
+  }
+
+  return files
+}
diff --git a/src/index.ts b/src/index.ts
index 363fefc..f95f3d6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -20,7 +20,9 @@ function mkdirp(dir: string) {
   try {
     fs.mkdirSync(dir, { recursive: true })
   } catch (e) {
-    if (e.code === 'EEXIST') return
+    if (e instanceof Error) {
+      if ('code' in e && e.code === 'EEXIST') return
+    }
     throw e
   }
 }
@@ -33,7 +35,7 @@ async function main() {
   const templateArg = args.template
 
   const templateDirs = await viaContentsApi(config)
-  const templates = {}
+  const templates: Record<string, { name: string }> = {}
 
   templateDirs.forEach((dir) => {
     let template = dir.replace(`${directoryName}/`, '')
@@ -129,7 +131,11 @@ async function main() {
       directoryPath: path.join(process.cwd(), target),
     })
   } catch (e) {
-    throw new Error(`Error running hook for ${templateName}: ${e.message}`)
+    throw new Error(
+      `Error running hook for ${templateName}: ${
+        e instanceof Error ? e.message : e
+      }`
+    )
   }
 
   console.log(bold(green('✔ Copied project files')))
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..0acf8e8
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "esModuleInterop": true,
+    "strict": true,
+    "types": [
+      "node"
+    ],
+    "lib": [
+      "esnext"
+    ],
+  },
+}
\ No newline at end of file