diff --git a/README.md b/README.md
index 05de3b629..38f5b0091 100644
--- a/README.md
+++ b/README.md
@@ -4,9 +4,7 @@
billboard.js is a re-usable, easy interface JavaScript chart library, based on D3 v4+.
> The name "billboard" comes from the famous `billboard chart` which everybody knows.
-
-> This project was forked from C3.js v0.4.11.
-> - [Why we decided to start billboard.js?](https://github.com/naver/billboard.js/wiki/Why-we-decided-to-start-billboard.js%3F)
+> - [Why we decided to start billboard.js?](https://github.com/naver/billboard.js/wiki/Why-we-decided-to-start-billboard.js%3F)
## Documents
- [API Documentation](https://naver.github.io/billboard.js/release/latest/doc/)
@@ -21,7 +19,7 @@ billboard.js is a re-usable, easy interface JavaScript chart library, based on D
## Playground
Play with the diverse options generating on the fly!
- https://naver.github.io/billboard.js/playground/
-- https://beta.observablehq.com/@idris-maps/billboard-js-playground (by @idris-maps)
+- https://beta.observablehq.com/@idris-maps/billboard-js-playground (by [@idris-maps](https://github.com/idris-maps))
## Questions?
If you have any questions, checkout the previous posts or create a new one at:
@@ -29,7 +27,7 @@ If you have any questions, checkout the previous posts or create a new one at:
- [Issue with 'question' label](https://github.com/naver/billboard.js/issues?utf8=%E2%9C%93&q=label%3Aquestion)
## Supported chart types
-![Chart Types](https://naver.github.io/billboard.js/img/chart-types.png?v=3)
+![Chart Types](https://naver.github.io/billboard.js/img/chart-types.png?v=4)
## Download and Installation