diff --git a/docs/mkdocs/requirements.txt b/docs/mkdocs/requirements.txt
index 8e02b289b..821ef57ae 100644
--- a/docs/mkdocs/requirements.txt
+++ b/docs/mkdocs/requirements.txt
@@ -6,6 +6,6 @@ mkdocs-material==9.6.22                             # theme for mkdocs
 mkdocs-material-extensions==1.3.1                   # extensions
 mkdocs-minify-plugin==0.8.0                         # plugin "minify"
 mkdocs-redirects==1.2.2                             # plugin "redirects"
-mkdocs-htmlproofer-plugin==1.3.0                    # plugin "htmlproofer"
+mkdocs-htmlproofer-plugin==1.4.0                    # plugin "htmlproofer"
 
 PyYAML==6.0.3                                       # linter