diff --git a/Directory.Packages.props b/Directory.Packages.props
index f4fd80e..27e0e03 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -23,7 +23,7 @@
     <!-- Security floors for transitive .NET and authentication dependencies. -->
     <PackageVersion Include="Microsoft.Extensions.Caching.Memory" Version="10.0.12" />
     <PackageVersion Include="Azure.Identity" Version="1.21.0" />
-    <PackageVersion Include="Microsoft.Identity.Client" Version="4.90.1" />
+    <PackageVersion Include="Microsoft.Identity.Client" Version="4.91.0" />
 
     <!-- Keep SQLite test coverage while requiring SQLite 3.50.2 or newer. -->
     <PackageVersion Include="SQLitePCLRaw.bundle_e_sqlite3" Version="3.0.5" />