diff --git a/src/NmeaParser/NmeaParser.csproj b/src/NmeaParser/NmeaParser.csproj
index 7792652..a38c929 100644
--- a/src/NmeaParser/NmeaParser.csproj
+++ b/src/NmeaParser/NmeaParser.csproj
@@ -44,6 +44,14 @@
PackageValidationSuppression.txt
+
+
+ 11.0
+ 13.1
+ 21.0
+ 10.0.17763.0
+ 10.0.17763.0
+
$(DefineConstants);NETSTANDARD