diff --git a/source/tasks/OctoInstaller/OctoInstallerV5/installer.ts b/source/tasks/OctoInstaller/OctoInstallerV5/installer.ts
index 2933f147..2ddfbbad 100644
--- a/source/tasks/OctoInstaller/OctoInstallerV5/installer.ts
+++ b/source/tasks/OctoInstaller/OctoInstallerV5/installer.ts
@@ -15,6 +15,7 @@ export class Installer {
     public async run(versionSpec: string) {
         await executeWithSetResult(
             async () => {
+                tasks.warning("Octopus CLI v5 is using a deprecated version of the Octopus CLI, we recommend using the latest version.");
                 const endpoint = await new DownloadEndpointRetriever(this.octopurlsUrl).getEndpoint(versionSpec);
                 let toolPath = tools.findLocalTool(TOOL_NAME, endpoint.version);