diff --git a/pyproject.toml b/pyproject.toml
index 618a6a2..b71d2ac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,6 +32,7 @@ requires = [
     "pyramid_mailer >= 0.15.1",
     "pyramid_tm >= 2.4",
     "pyramid_retry >= 2.1",
+    "requests >= 2.23.0",
     "sqlalchemy >= 1.3.15",
     "transaction >= 3.0.0",
     "waitress >= 1.4.3",