diff --git a/libris-maleficarum-service/Directory.Packages.props b/libris-maleficarum-service/Directory.Packages.props
index 2b3fbf5b..9deb0551 100644
--- a/libris-maleficarum-service/Directory.Packages.props
+++ b/libris-maleficarum-service/Directory.Packages.props
@@ -40,7 +40,7 @@
     <PackageVersion Include="Microsoft.AspNetCore.OpenApi" Version="10.0.8" />
 
     <!-- Authentication packages -->
-    <PackageVersion Include="Microsoft.Identity.Web" Version="3.15.0" />
+    <PackageVersion Include="Microsoft.Identity.Web" Version="4.9.0" />
 
     <!-- Other Azure packages -->
     <PackageVersion Include="Microsoft.Azure.Cosmos" Version="3.60.0" />