diff --git a/README.md b/README.md
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 # Vaultix
 
 [![nixos infra](https://img.shields.io/badge/NixOS%20infra-3A8FB7?style=for-the-badge&logo=nixos&logoColor=BBDDE5)](https://nixos.wiki/wiki/Comparison_of_secret_managing_schemes)
-[![doc](https://img.shields.io/badge/document-20604F?style=for-the-badge&logo=gitbook&logoColor=BBDDE5)](https://oluceps.github.io/vaultix/)
+[![doc](https://img.shields.io/badge/document-CAAD5F?style=for-the-badge&logo=gitbook&logoColor=BBDDE5)](https://oluceps.github.io/vaultix/)
 [![eval status](https://img.shields.io/github/actions/workflow/status/oluceps/vaultix/eval.yaml?branch=main&style=for-the-badge&label=eval&color=00AA90)](https://github.com/oluceps/vaultix/actions?query=branch%3Amain)
 [![test status](https://img.shields.io/github/actions/workflow/status/oluceps/vaultix/vm-test.yaml?branch=main&style=for-the-badge&label=test&color=00AA90)](https://github.com/oluceps/vaultix/actions?query=branch%3Amain)