diff --git a/Makefile b/Makefile
index 74300fbb..a76ef2cd 100644
--- a/Makefile
+++ b/Makefile
@@ -105,6 +105,6 @@ help: ## Show this help screen
 	@echo ''
 	@echo 'Available targets are:'
 	@echo ''
-	@grep -E '^[ a-zA-Z0-9_.-]+:.*?## .*$$' $(MAKEFILE_LIST) | \
+	@grep -E '^[ a-zA-Z0-9_./-]+:.*?## .*$$' $(MAKEFILE_LIST) | \
 		awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-33s\033[0m %s\n", $$1, $$2}'
 	@echo ''
diff --git a/README.md b/README.md
index 9409317f..ee9b290d 100644
--- a/README.md
+++ b/README.md
@@ -567,6 +567,9 @@ format                            Format the code into unified format
 schema                            Generate OpenAPI schema file
 openapi-doc                       Generate OpenAPI documentation
 requirements.txt                  Generate requirements.txt file containing hashes for all non-devel packages
+docs/config.puml                  Generate PlantUML class diagram for configuration
+docs/config.png                   Generate an image with configuration graph
+docs/config.svg                   Generate an SVG with configuration graph
 shellcheck                        Run shellcheck
 verify                            Run all linters
 distribution-archives             Generate distribution archives to be uploaded into Python registry