diff --git a/src/cli/lib/next-config.ts b/src/cli/lib/next-config.ts
index e75a36f..589b963 100644
--- a/src/cli/lib/next-config.ts
+++ b/src/cli/lib/next-config.ts
@@ -8,7 +8,7 @@ import { videoConfigDefault } from '../../config.js';
 import type { VideoConfig } from '../../config.js';
 
 function extensionToType(filePath: string) {
-  if (filePath.endsWith('.mjs')) {
+  if (filePath.endsWith('.mjs') || filePath.endsWith('.ts')) {
     return 'module';
   }
 
@@ -20,7 +20,7 @@ export default async function updateNextConfigFile(parentDir: string = './', vid
   let configPath: string | undefined = undefined;
   let configContents: string = '';
 
-  const pathsToCheck = ['next.config.js', 'next.config.mjs'];
+  const pathsToCheck = ['next.config.js', 'next.config.mjs', 'next.config.ts'];
 
   for (let i = 0; i < pathsToCheck.length; i++) {
     const filePath = path.join(parentDir, pathsToCheck[i]);
diff --git a/tests/cli/lib/next-config.test.ts b/tests/cli/lib/next-config.test.ts
index 846370b..b8a6f94 100644
--- a/tests/cli/lib/next-config.test.ts
+++ b/tests/cli/lib/next-config.test.ts
@@ -10,6 +10,10 @@ function outputConfigName(configName: string) {
     return 'next.config.mjs';
   }
 
+  if (configName.endsWith('.ts')) {
+    return 'next.config.ts';
+  }
+
   // We have to return cjs files so we can import them async in a test.
   return 'next.config.js';
 }
@@ -49,4 +53,12 @@ describe('updateNextConfig', () => {
     const updatedContents = await fs.readFile(path.join(dirPath, 'next.config.mjs'), 'utf-8');
     assert(updatedContents.includes('next-video'));
   });
+
+  it('should add next-video to the next.config.ts file', async () => {
+    const dirPath = await createTempDirWithConfig('next.config.ts');
+    await updateNextConfigFile(dirPath);
+
+    const updatedContents = await fs.readFile(path.join(dirPath, 'next.config.ts'), 'utf-8');
+    assert(updatedContents.includes('next-video'));
+  });
 });
diff --git a/tests/factories/next.config.ts b/tests/factories/next.config.ts
new file mode 100644
index 0000000..2c7a945
--- /dev/null
+++ b/tests/factories/next.config.ts
@@ -0,0 +1,7 @@
+import type { NextConfig } from 'next'
+ 
+const nextConfig: NextConfig = {
+  /* config options here */
+}
+ 
+export default nextConfig