diff --git a/README.md b/README.md
index c91ebcb..b76665c 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 </p>
 
 <p align="center">
-  <a title="dbhi.github.io/qus" href="https://dbhi.github.io/qus"><img src="./docs/logo/light.png" width="550"/></a>
+  <a title="dbhi.github.io/qus" href="https://dbhi.github.io/qus"><img src="./docs/logo/logo_blur.png" width="550"/></a>
 </p>
 
 <p align="center">
diff --git a/docs/_index.Rmd b/docs/_index.Rmd
index 78f1ee2..42ea933 100644
--- a/docs/_index.Rmd
+++ b/docs/_index.Rmd
@@ -30,7 +30,7 @@ license: CC-BY-4.0
 (ref:repoTree) github.com/dbhi/qus/tree/main
 
 ```{r adaption, echo=FALSE, out.width = '85%', fig.align='center'}
-knitr::include_graphics("logo/light.png")
+knitr::include_graphics("logo/logo.png")
 ```
 
 <aside>
diff --git a/docs/logo/light.png b/docs/logo/logo.png
similarity index 100%
rename from docs/logo/light.png
rename to docs/logo/logo.png
diff --git a/docs/logo/logo_blur.png b/docs/logo/logo_blur.png
new file mode 100644
index 0000000..fc58c69
Binary files /dev/null and b/docs/logo/logo_blur.png differ