diff --git a/DESCRIPTION b/DESCRIPTION
index 9a23852..f33a352 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: ggpp
 Type: Package
 Title: Grammar Extensions to 'ggplot2'
-Version: 0.5.7.9001
+Version: 0.5.8
 Date: 2024-06-26
 Authors@R:
     c(
diff --git a/README.Rmd b/README.Rmd
index 1e3b808..ff61d75 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -23,7 +23,7 @@ version](https://www.r-pkg.org/badges/version/ggpp)](https://cran.r-project.org/
 [![R-CMD-check](https://github.com/aphalo/ggpp/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/aphalo/ggpp/actions/workflows/R-CMD-check.yaml)
 [![Coverage](https://raw.githubusercontent.com/aphalo/ggpp/_xml_coverage_reports/data/master/badge.svg)](https://raw.githubusercontent.com/aphalo/ggpp/_xml_coverage_reports/data/master/coverage.xml)
 <a href="https://docs.r4photobiology.info/ggpp/"><img src="https://img.shields.io/badge/documentation-ggpp-informational.svg" alt="" /></a>
-[![](https://img.shields.io/badge/doi-10.32614/CRAN.package.ggpp-black.svg)](https://doi.org/10.32614/CRAN.package.ggpp)
+[![](https://img.shields.io/badge/doi-10.32614/CRAN.package.ggpp-blue.svg)](https://doi.org/10.32614/CRAN.package.ggpp)
 <!-- badges: end -->
 
 ## Purpose
diff --git a/README.md b/README.md
index 5a2d44f..70455ee 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ badge](https://aphalo.r-universe.dev/badges/ggpp)](https://aphalo.r-universe.dev
 [![R-CMD-check](https://github.com/aphalo/ggpp/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/aphalo/ggpp/actions/workflows/R-CMD-check.yaml)
 [![Coverage](https://raw.githubusercontent.com/aphalo/ggpp/_xml_coverage_reports/data/master/badge.svg)](https://raw.githubusercontent.com/aphalo/ggpp/_xml_coverage_reports/data/master/coverage.xml)
 <a href="https://docs.r4photobiology.info/ggpp/"><img src="https://img.shields.io/badge/documentation-ggpp-informational.svg" alt="" /></a>
-[![](https://img.shields.io/badge/doi-10.32614/CRAN.package.ggpp-black.svg)](https://doi.org/10.32614/CRAN.package.ggpp)
+[![](https://img.shields.io/badge/doi-10.32614/CRAN.package.ggpp-blue.svg)](https://doi.org/10.32614/CRAN.package.ggpp)
 <!-- badges: end -->
 
 ## Purpose
@@ -354,7 +354,7 @@ citation("ggpp")
 #> To cite package 'ggpp' in publications use:
 #> 
 #>   Aphalo P (2024). _ggpp: Grammar Extensions to 'ggplot2'_. R package
-#>   version 0.5.7.9000, https://github.com/aphalo/ggpp,
+#>   version 0.5.7.9001, https://github.com/aphalo/ggpp,
 #>   <https://docs.r4photobiology.info/ggpp/>.
 #> 
 #> A BibTeX entry for LaTeX users is
@@ -363,7 +363,7 @@ citation("ggpp")
 #>     title = {ggpp: Grammar Extensions to 'ggplot2'},
 #>     author = {Pedro J. Aphalo},
 #>     year = {2024},
-#>     note = {R package version 0.5.7.9000, 
+#>     note = {R package version 0.5.7.9001, 
 #> https://github.com/aphalo/ggpp},
 #>     url = {https://docs.r4photobiology.info/ggpp/},
 #>   }