diff --git a/piker/brokers/deribit/api.py b/piker/brokers/deribit/api.py
index 4eb15c73..420fd101 100644
--- a/piker/brokers/deribit/api.py
+++ b/piker/brokers/deribit/api.py
@@ -112,6 +112,10 @@ def deribit_timestamp(when: datetime) -> int:
     )
 
 
+def get_timestamp_int(expiry_date: str) -> int:
+    return int(time.mktime(time.strptime(expiry_date, '%d%b%y')))
+
+
 def str_to_cb_sym(name: str) -> Symbol:
     base, strike_price, expiry_date, option_type = name.split('-')
 
@@ -124,8 +128,9 @@ def str_to_cb_sym(name: str) -> Symbol:
     else:
         raise Exception("Couldn\'t parse option type")
 
-    new_expiry_date = get_values_from_cb_normalized_date(expiry_date)
-
+    new_expiry_date: int = get_timestamp_int(
+        get_values_from_cb_normalized_date(expiry_date)
+    )
     return Symbol(
         base=base,
         quote=quote,
@@ -145,6 +150,7 @@ def piker_sym_to_cb_sym(name: str) -> Symbol:
     )= tuple(
         name.upper().split('-'))
 
+    new_expiry_date = get_timestamp_int(expiry_date)
     quote: str = base
 
     if option_type == 'P':
@@ -160,7 +166,7 @@ def piker_sym_to_cb_sym(name: str) -> Symbol:
         type=OPTION,
         strike_price=strike_price,
         option_type=option_type,
-        expiry_date=expiry_date
+        expiry_date=new_expiry_date
     )