diff --git a/requirements.txt b/requirements.txt
index 5e16906163..4bc13c0a08 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 # Updated May 17 2021
 sphinx==2.4.4
-sphinxcontrib-phpdomain==0.7.2
+sphinxcontrib-phpdomain==0.10.0
 cakephpsphinx>=0.1.30,<1.0