diff --git a/gtk-doc.spec b/gtk-doc.spec
index f086712..111122a 100644
--- a/gtk-doc.spec
+++ b/gtk-doc.spec
@@ -25,12 +25,15 @@ BuildRequires: python3-devel
 BuildRequires: python3-pygments
 BuildRequires: python3-parameterized
 BuildRequires: python3-anytree
+BuildRequires: python3-lxml
 BuildRequires: yelp-tools
 
 # Following are not automatically installed
 Requires: docbook-utils /usr/bin/xsltproc docbook-style-xsl
-Requires: python3-six
-Requires: source-highlight
+Requires: python3-pygments
+Requires: python3-parameterized
+Requires: python3-anytree
+Requires: python3-lxml
 
 %description
 gtk-doc is a tool for generating API reference documentation.