diff --git a/docs/requirements.txt b/docs/requirements.txt
index 697904d5e..830288062 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -14,6 +14,6 @@ six==1.11.0
 snowballstemmer==1.2.1
 Sphinx==1.5.1
 sphinx-rtd-theme==0.1.9
-sphinxcontrib-phpdomain==0.2.1
+sphinxcontrib-phpdomain==0.12.0
 urllib3==1.26.19
 cakephp-theme