diff --git a/vnpy/trader/constant.py b/vnpy/trader/constant.py
index 1ebb2aa8..f7159a53 100644
--- a/vnpy/trader/constant.py
+++ b/vnpy/trader/constant.py
@@ -100,6 +100,7 @@ class Exchange(Enum):
     HKFE = "HKFE"           # Hong Kong Futures Exchange
     SGX = "SGX"             # Singapore Global Exchange
     CBOT = "CBT"            # Chicago Board of Trade
+    CBOE = "CBOE"           # Chicago Board Options Exchange
     DME = "DME"             # Dubai Mercantile Exchange
     EUREX = "EUX"           # Eurex Exchange
     APEX = "APEX"           # Asia Pacific Exchange