diff --git a/README.md b/README.md
index dea5fc73..c88ce1b5 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,9 @@
 >
 > Powering 🛰️ [Filecoin Station](https://github.com/filecoin-station/filecoin-station).
 
+> [!CAUTION]
+> **This project is no longer maintained.**
+
 ## Installation
 
 See [CLI Installation](./cli/README.md#installation).
diff --git a/cli/README.md b/cli/README.md
index 13bf0653..75b8ab43 100644
--- a/cli/README.md
+++ b/cli/README.md
@@ -14,6 +14,8 @@
 Zinnia is a sandboxed and resource-limited runtime for distributed workers. This crate provides the
 `zinnia` executable to run modules locally, e.g. while developing.
 
+**CAUTION: This crate is no longer maintained.**
+
 ## Installation
 
 You can download the `zinnia` binary from
diff --git a/daemon/README.md b/daemon/README.md
index a8a27248..19017910 100644
--- a/daemon/README.md
+++ b/daemon/README.md
@@ -14,6 +14,8 @@
 Zinnia is a sandboxed and resource-limited runtime for distributed workers. This crate provides a
 daemon to run Zinnia Modules inside Filecoin Station.
 
+**CAUTION: This crate is no longer maintained.**
+
 ## Installation
 
 You can download the `zinniad` binary from
diff --git a/runtime/README.md b/runtime/README.md
index b5daf759..d3e364b4 100644
--- a/runtime/README.md
+++ b/runtime/README.md
@@ -14,3 +14,5 @@
 
 Zinnia is a runtime for Filecoin Station modules. This crate provides the runtime including all
 platform APIs.
+
+**CAUTION: This crate is no longer maintained.**