diff --git a/README.md b/README.md
index 4185e39..e6b8ca7 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@
 
 |    |    |    |    |    |    |    |    |    |
 |:-:  |:-:  |:-:  |:-:  |:-:  |:-:  |:-:  |:-:  |:-:  |
-| [#](#-interview)  | [A](#a-interview)  | [](#b-interview)  | [](#c-interview)  | [](#d-interview)  | [](#e-interview)  | [](#f-interview)  | [](#g-interview)  | [](#h-interview)  |
+| [#](#-interview)  | [A](#a-interview)  | [](#b-interview)  | [C](#c-interview)  | [](#d-interview)  | [](#e-interview)  | [](#f-interview)  | [](#g-interview)  | [](#h-interview)  |
 | [](#i-interview)  | [](#j-interview)  | [](#k-interview)  | [](#l-interview)  | [](#m-interview)  | [](#n-interview)  | [](#o-interview)  | [](#p-interview)  | [](#q-interview)  |
 | [](#r-interview)  | [S](#s-interview)  | [T](#t-interview)  | [](#u-interview)  | [](#v-interview)  | [W](#w-interview)  | [](#x-interview)  | [Y](#y-interview)  | [](#z-interview) |
 
@@ -325,6 +325,9 @@
 #### A interview
 - [System Design Interview: Design Airbnb](https://newsletter.systemdesign.one/p/airbnb-system-design)
 
+#### C interview
+- [System Design Interview: Design ChatGPT](https://newsletter.systemdesign.one/p/chatgpt-system-design)
+
 #### S interview
 - [System Design Interview: Design Spotify](https://newsletter.systemdesign.one/p/spotify-system-design)
 - [System Design Interview: Design Web Crawler and Search Engine](https://newsletter.systemdesign.one/p/web-crawler-system-design)