diff --git a/.github/workflows/commit-ibflex.yml b/.github/workflows/commit-ibflex.yml
index 0e112a8..f341f09 100644
--- a/.github/workflows/commit-ibflex.yml
+++ b/.github/workflows/commit-ibflex.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: [3.7.17, 3.8]
 
     steps:
     - uses: actions/checkout@v2
diff --git a/ibflex/Types.py b/ibflex/Types.py
index 6ab7555..842664a 100644
--- a/ibflex/Types.py
+++ b/ibflex/Types.py
@@ -1427,6 +1427,39 @@ class SymbolSummary(FlexElement):
     relatedTradeID: Optional[str] = None
     origTransactionID: Optional[str] = None
     relatedTransactionID: Optional[str] = None
+    settleDateTarget: Optional[datetime.date] = None
+    tradePrice: Optional[decimal.Decimal] = None
+    TradePrice: Optional[decimal.Decimal] = None
+    tradeMoney: Optional[decimal.Decimal] = None
+    taxes: Optional[decimal.Decimal] = None
+    ibCommission: Optional[decimal.Decimal] = None
+    ibCommissionCurrency: Optional[str] = None
+    netCash: Optional[decimal.Decimal] = None
+    closePrice: Optional[decimal.Decimal] = None
+    openCloseIndicator: Optional[enums.OpenClose] = None
+    notes: Optional[str] = None
+    cost: Optional[decimal.Decimal] = None
+    fifoPnlRealized: Optional[decimal.Decimal] = None
+    mtmPnl: Optional[decimal.Decimal] = None
+    origOrderID: Optional[str] = None
+    ibOrderID: Optional[str] = None
+    transactionID: Optional[str] = None
+    ibExecID: Optional[str] = None
+    rtn: Optional[str] = None
+    exchOrderId: Optional[str] = None
+    extExecID: Optional[str] = None
+    openDateTime: Optional[datetime.datetime] = None
+    holdingPeriodDateTime: Optional[datetime.datetime] = None
+    whenRealized: Optional[datetime.datetime] = None
+    whenReopened: Optional[datetime.datetime] = None
+    changeInPrice: Optional[decimal.Decimal] = None
+    changeInQuantity: Optional[decimal.Decimal] = None
+    initialInvestment: Optional[decimal.Decimal] = None
+    serialNumber: Optional[str] = None
+    deliveryType: Optional[str] = None
+    commodityType: Optional[str] = None
+    fineness: Optional[str] = None
+    weight: Optional[decimal.Decimal] = None
 
 
 @dataclass(frozen=True)
@@ -2486,6 +2519,7 @@ class SecurityInfo(FlexElement):
     commodityType: Optional[str] = None
     fineness: Optional[decimal.Decimal] = None
     weight: Optional[str] = None
+    securityType: Optional[str] = None
 
 
 @dataclass(frozen=True)
diff --git a/ibflex/parser.py b/ibflex/parser.py
index af6b270..3f17d9d 100755
--- a/ibflex/parser.py
+++ b/ibflex/parser.py
@@ -173,6 +173,8 @@ def parse_element_attr(
 def prep_date(value: str) -> Tuple[int, int, int]:
     """Returns a tuple of (year, month, day).
     """
+    if value == "MULTI":
+        return None
     date_format = DATE_FORMATS[len(value)][value.count('/')]
     return datetime.datetime.strptime(value, date_format).timetuple()[:3]
 
@@ -189,6 +191,8 @@ def prep_datetime(value: str) -> Tuple[int, ...]:
     """
     #  HACK - some old data has ", " separator instead of ",".
     value = value.replace(", ", ",")
+    if value == "MULTI":
+        return None
 
     def merge_date_time(datestr: str, timestr: str) -> Tuple[int, ...]:
         """Convert presplit date/time strings into args ready for datetime().