diff --git a/src/lib/utils.ts b/src/lib/utils.ts
index a0a2e34..d5c3286 100644
--- a/src/lib/utils.ts
+++ b/src/lib/utils.ts
@@ -314,8 +314,8 @@ export function setupOAuthCallbackServerWithLongPoll(options: OAuthCallbackServe
       Authorization successful!
       You may close this window and return to the CLI.
       <script>
-        // If this is a non-interactive session (no manual approval step was required) then 
-        // this should automatically close the window. If not, this will have no effect and 
+        // If this is a non-interactive session (no manual approval step was required) then
+        // this should automatically close the window. If not, this will have no effect and
         // the user will see the message above.
         window.close();
       </script>
@@ -431,7 +431,7 @@ export async function parseCommandLineArgs(args: string[], usage: string) {
     } else if (args[i] === '--headerFile' && i < args.length - 1) {
       const filePath = args[i + 1]
       try {
-        const fileContent = fs.readFileSync(filePath, 'utf8')
+        const fileContent = await fs.readFile(filePath, 'utf8')
         const lines = fileContent.split('\n')
         for (const line of lines) {
           const trimmedLine = line.trim()
@@ -446,7 +446,7 @@ export async function parseCommandLineArgs(args: string[], usage: string) {
         }
         log(`Loaded headers from file: ${filePath}`)
       } catch (error) {
-        log(`Error reading header file ${filePath}: ${error.message}`)
+        log(`Error reading header file ${filePath}: ${error}`)
       }
       args.splice(i, 2)
       // Do not increment i, as the array has shifted