diff --git a/examples/https/README.md b/examples/https/README.md
index 6840bde9..ba5fc5cc 100644
--- a/examples/https/README.md
+++ b/examples/https/README.md
@@ -1,12 +1,20 @@
 ## How to run demo
 
-### 1. Install Npm
+### 1. Generate a self-signed certificate (key.pem and cert.pem)
+```bash
+openssl genrsa -out key.pem
+openssl req -new -key key.pem -out csr.pem
+openssl x509 -req -days 9999 -in csr.pem -signkey key.pem -out cert.pem
+rm csr.pem
+```
+
+### 2. Install Npm
 ```bash
 yarn
 // npm i
 ```
 
-### 2. Start the server
+### 3. Start the server
 ```
 npm run serve
 ```
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