diff --git a/requirements.txt b/requirements.txt
index 86b4e8c6d8..f7a4c0d4b6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -72,3 +72,4 @@ Unidecode>=1.3.4
 weasyprint>=59
 xml2rfc>=3.12.4
 xym>=0.6,<1.0
+pydantic<2 # Temporary pin until inflect can catch up.