diff --git a/markup/asciidocext/asciidocext_config/config.go b/markup/asciidocext/asciidocext_config/config.go
index 8cc3e79e67d..aef998b516e 100644
--- a/markup/asciidocext/asciidocext_config/config.go
+++ b/markup/asciidocext/asciidocext_config/config.go
@@ -33,10 +33,12 @@ var (
 
 	AllowedExtensions = map[string]bool{
 		"asciidoctor-html5s":           true,
+		"asciidoctor-bibtex":           true,
 		"asciidoctor-diagram":          true,
 		"asciidoctor-interdoc-reftext": true,
 		"asciidoctor-katex":            true,
 		"asciidoctor-latex":            true,
+		"asciidoctor-mathematical":     true,
 		"asciidoctor-question":         true,
 		"asciidoctor-rouge":            true,
 	}