diff --git a/src/judas_protocol/types.py b/src/judas_protocol/types.py
index 0d0b412..9b353dc 100644
--- a/src/judas_protocol/types.py
+++ b/src/judas_protocol/types.py
@@ -13,3 +13,4 @@ class Category(str, Enum):
 class ControlAction(str, Enum):
     HELLO = "hello"
     ACK = "ack"
+    CLOSE = "close"