Software⏱️ 2 min read📅 2026-05-31
How to Fix: First Heroku deploy failed `error code=H10`
Quick Answer: Check your server logs for more information about the crash.
📋 Table of Contents
The error code H10 indicates that the Heroku router encountered an internal server error and crashed. This is often caused by a misconfiguration or mismatch in the dependencies of your application.
🔍 Why This Happens
- The Heroku buildpack is unable to find a compatible version of Node.js.
🛠️ Step-by-Step Verified Fixes
Method 1: Update Node.js Version
- Step 1: Open the Heroku CLI and run `heroku buildpacks:set heroku/node` to switch to the official Heroku Node.js buildpack.
Method 2: Specify a Compatible Node.js Version
- Step 1: Open your `package.json` file and update the `engines` section to specify a compatible version of Node.js, for example:
❓ Frequently Asked Questions
The Heroku buildpack is unable to find a compatible version of Node.js.
Step 1: Open the Heroku CLI and run `heroku buildpacks:set heroku/node` to switch to the official Heroku Node.js buildpack.
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