diff --git a/clients.toml b/clients.toml
index 616b0a63..c6a6174a 100644
--- a/clients.toml
+++ b/clients.toml
@@ -166,7 +166,7 @@ package = "zu"
 registry = "vcpkg and Conan"
 maintainer = "Tam Nguyen Duc <@tamnd>"
 tier = 1
-holds = ["quickstart", "idiom", "conditions", "misuse", "leaks"]
+holds = ["quickstart", "reference", "idiom", "conditions", "misuse", "leaks"]
 doc = "The developer kit for the ABI itself: examples, the header-only C++ wrapper, the packaging and the sanitizer suites. It owes no api-map, because the C names are zu.h and zu.h is generated in the engine."
 
 [[client]]
diff --git a/docs/clients/overview.md b/docs/clients/overview.md
index dfaea3ed..0e53461c 100644
--- a/docs/clients/overview.md
+++ b/docs/clients/overview.md
@@ -53,7 +53,7 @@ The practice score, today, out of what the client's tier asks for. What is missi
 | [zu-node](https://github.com/tamnd/zu-node) | 1 | 90 | 90 | `api-map`, `perf` |
 | [zu-go](https://github.com/tamnd/zu-go) | 1 | 90 | 90 | `api-map`, `perf` |
 | [zu-java](https://github.com/tamnd/zu-java) | 1 | 90 | 90 | `api-map`, `perf` |
-| [zu-c](https://github.com/tamnd/zu-c) | 1 | 67 | 90 | `reference`, `install`, `stability` |
+| [zu-c](https://github.com/tamnd/zu-c) | 1 | 78 | 90 | `install`, `stability` |
 | [zu-dotnet](https://github.com/tamnd/zu-dotnet) | 2 | 0 | 75 | `quickstart`, `reference`, `idiom`, `conditions`, `misuse`, `leaks`, `install`, `stability`, `api-map`, `perf` |
 | [zu-kit](https://github.com/tamnd/zu-kit) | 3 | 0 | 50 | `quickstart`, `reference`, `idiom`, `conditions`, `misuse`, `leaks`, `install`, `stability` |