diff --git a/pages/guide/troubleshooting/developer-tools.mdx b/pages/guide/troubleshooting/developer-tools.mdx
index 6d3687e..c61aa32 100644
--- a/pages/guide/troubleshooting/developer-tools.mdx
+++ b/pages/guide/troubleshooting/developer-tools.mdx
@@ -5,6 +5,12 @@ import { Terminal, Code, Server } from 'lucide-react'
 
 Even if you installed the Root CA on your operating system, many developer tools and programming languages **ignore the system store** and use their own.
 
+<Callout type="info" emoji="⬇️">
+  **Prerequisite:**
+  You must have the **`trustlab-root.crt`** file downloaded on your machine first.
+  [Download it here](/guide/getting-started/install-root-ca).
+</Callout>
+
 If your code or scripts are failing with certificate errors, check the solutions below.
 
 ## 1. cURL & Wget