diff --git a/HISTORY.rst b/HISTORY.rst
index 067e3cc..8fd87c4 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -3,6 +3,11 @@
 History
 -------
 
+3.1.0
+++++++++++++++++++
+
+* Added ``cryptomus`` to the ``/payment/processor`` validation.
+
 3.0.0 (2025-02-10)
 ++++++++++++++++++
 
diff --git a/minfraud/validation.py b/minfraud/validation.py
index 6d4d3e7..1099cc1 100644
--- a/minfraud/validation.py
+++ b/minfraud/validation.py
@@ -139,6 +139,7 @@ def _hostname(hostname: str) -> str:
         "coregateway",
         "creditguard",
         "credorax",
+        "cryptomus",
         "ct_payments",
         "cuentadigital",
         "curopayments",