diff --git a/docs-requirements.txt b/docs-requirements.txt
index 74ebf315..7f73d832 100644
--- a/docs-requirements.txt
+++ b/docs-requirements.txt
@@ -4,5 +4,5 @@ sphinx
 sphinx_rtd_theme
 sphinxcontrib-jquery
 pypandoc
-# Temporary pin, can remove once it installs without this
+# Temporary pin, xraylib 4.1.3 (pcdscalc) incompatible
 numpy <2