diff --git a/manifest.yml b/manifest.yml
index d02c6a403..829f76974 100644
--- a/manifest.yml
+++ b/manifest.yml
@@ -130,6 +130,15 @@ dependencies:
   - cflinuxfs3
   source: https://builds.dotnet.microsoft.com/dotnet/Sdk/8.0.415/dotnet-sdk-8.0.415-linux-x64.tar.gz
   source_sha256: a18944685e180887e32b9662f31521012a2c11851e63cbb7907f5f12f4a2461e
+- name: dotnet-sdk
+  version: 8.0.421
+  uri: https://buildpacks.cloudfoundry.org/dependencies/dotnet-sdk/dotnet-sdk_8.0.421_linux_x64_cflinuxfs4_930db7bb.tar.xz
+  sha256: 930db7bbc659ef752a9782f2c6709056deab6ce44f9d598e2d4d959fb79cfeb0
+  cf_stacks:
+  - cflinuxfs4
+  - cflinuxfs5
+  source: https://builds.dotnet.microsoft.com/dotnet/Sdk/8.0.421/dotnet-sdk-8.0.421-linux-x64.tar.gz
+  source_sha256: ''
 - name: dotnet-sdk
   version: 9.0.306
   uri: https://buildpacks.cloudfoundry.org/dependencies/dotnet-sdk/dotnet-sdk_9.0.306_linux_x64_any-stack_c1340494.tar.xz