diff --git a/README.md b/README.md
index ad63e21..030470d 100644
--- a/README.md
+++ b/README.md
@@ -201,9 +201,9 @@ create-colleague/
 
 <a href="https://www.star-history.com/?repos=titanwings%2Fcolleague-skill&type=date&legend=top-left">
  <picture>
-   <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/image?repos=titanwings/colleague-skill&type=date&theme=dark&legend=top-left&v=20260331" />
-   <source media="(prefers-color-scheme: light)" srcset="https://api.star-history.com/image?repos=titanwings/colleague-skill&type=date&legend=top-left&v=20260331" />
-   <img alt="Star History Chart" src="https://api.star-history.com/image?repos=titanwings/colleague-skill&type=date&legend=top-left&v=20260331" />
+   <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/svg?repos=titanwings/colleague-skill&type=date&theme=dark&legend=top-left" />
+   <source media="(prefers-color-scheme: light)" srcset="https://api.star-history.com/svg?repos=titanwings/colleague-skill&type=date&legend=top-left" />
+   <img alt="Star History Chart" src="https://api.star-history.com/svg?repos=titanwings/colleague-skill&type=date&legend=top-left" />
  </picture>
 </a>
 
diff --git a/README_EN.md b/README_EN.md
index d2492f8..ebd0d1a 100644
--- a/README_EN.md
+++ b/README_EN.md
@@ -203,9 +203,9 @@ create-colleague/
 
 <a href="https://www.star-history.com/?repos=titanwings%2Fcolleague-skill&type=date&legend=top-left">
  <picture>
-   <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/image?repos=titanwings/colleague-skill&type=date&theme=dark&legend=top-left&v=20260331" />
-   <source media="(prefers-color-scheme: light)" srcset="https://api.star-history.com/image?repos=titanwings/colleague-skill&type=date&legend=top-left&v=20260331" />
-   <img alt="Star History Chart" src="https://api.star-history.com/image?repos=titanwings/colleague-skill&type=date&legend=top-left&v=20260331" />
+   <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/svg?repos=titanwings/colleague-skill&type=date&theme=dark&legend=top-left" />
+   <source media="(prefers-color-scheme: light)" srcset="https://api.star-history.com/svg?repos=titanwings/colleague-skill&type=date&legend=top-left" />
+   <img alt="Star History Chart" src="https://api.star-history.com/svg?repos=titanwings/colleague-skill&type=date&legend=top-left" />
  </picture>
 </a>