diff --git a/docs/ReleaseNotes.md b/docs/ReleaseNotes.md
index ee3dffb..f7c7ad2 100644
--- a/docs/ReleaseNotes.md
+++ b/docs/ReleaseNotes.md
@@ -2,6 +2,7 @@
 
 _0.4.17_
 - Exclude phonetic component when reading string values.
+- Allow invalid ref values, which Excel appears to treat as missing. 
 
 _0.4.16_
 - Adds ExcelFileType class that exposes constants about supported Excel formats: extensions and content types.
diff --git a/source/Sylvan.Data.Excel/Sylvan.Data.Excel.csproj b/source/Sylvan.Data.Excel/Sylvan.Data.Excel.csproj
index 2ff7477..3f7e4a1 100644
--- a/source/Sylvan.Data.Excel/Sylvan.Data.Excel.csproj
+++ b/source/Sylvan.Data.Excel/Sylvan.Data.Excel.csproj
@@ -4,7 +4,7 @@
 		<TargetFrameworks>net6.0;netstandard2.1;netstandard2.0</TargetFrameworks>
 		<LangVersion>latest</LangVersion>
 		<VersionPrefix>0.4.17</VersionPrefix>
-		<VersionSuffix>b0001</VersionSuffix>
+		<VersionSuffix>b0002</VersionSuffix>
 		<Description>A cross-platform .NET library for reading Excel data files.</Description>
 		<PackageTags>excel;xls;xlsx;xlsb;datareader</PackageTags>
 		<Nullable>enable</Nullable>