diff --git a/HISTORY.rst b/HISTORY.rst
index 8ad2903..6f334ec 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -6,6 +6,8 @@ History
 3.3.0
 ++++++++++++++++++
 
+* Added ``banquest``, ``summit_payments``, and ``yaadpay`` to the
+  ``/payment/processor`` validation.
 * The version is now retrieved from package metadata at runtime using
   ``importlib.metadata``. This reduces the chance of version inconsistencies
   during releases.
diff --git a/src/minfraud/validation.py b/src/minfraud/validation.py
index cdd0f6b..dc22072 100644
--- a/src/minfraud/validation.py
+++ b/src/minfraud/validation.py
@@ -126,6 +126,7 @@ def _hostname(hostname: str) -> str:
         "aps_payments",
         "authorizenet",
         "balanced",
+        "banquest",
         "beanstream",
         "bluepay",
         "bluesnap",
@@ -257,6 +258,7 @@ def _hostname(hostname: str) -> str:
         "solidtrust_pay",
         "sps_decidir",
         "stripe",
+        "summit_payments",
         "synapsefi",
         "systempay",
         "telerecargas",
@@ -276,6 +278,7 @@ def _hostname(hostname: str) -> str:
         "windcave",
         "wirecard",
         "worldpay",
+        "yaadpay",
     ],
 )