diff --git a/docs/content/en/docs-dev/user-guide/managing-piped/runtime-options.md b/docs/content/en/docs-dev/user-guide/managing-piped/runtime-options.md
index 1dd1b6a2f7..a0c0790383 100644
--- a/docs/content/en/docs-dev/user-guide/managing-piped/runtime-options.md
+++ b/docs/content/en/docs-dev/user-guide/managing-piped/runtime-options.md
@@ -17,6 +17,7 @@ Usage:
 Flags:
       --add-login-user-to-passwd                   Whether to add login user to $HOME/passwd. This is typically for applications running as a random user ID.
       --admin-port int                             The port number used to run a HTTP server for admin tasks such as metrics, healthz. (default 9085)
+      --app-manifest-cache-count int               The number of app manifests to cache. The cache-key contains the commit hash. The default is 150. (default 150)     
       --cert-file string                           The path to the TLS certificate file.
       --config-aws-secret string                   The ARN of secret that contains Piped config and be stored in AWS Secrets Manager.
       --config-data string                         The base64 encoded string of the configuration data.
diff --git a/docs/content/en/docs-v0.48.x/user-guide/managing-piped/runtime-options.md b/docs/content/en/docs-v0.48.x/user-guide/managing-piped/runtime-options.md
index 1dd1b6a2f7..54dfc05936 100644
--- a/docs/content/en/docs-v0.48.x/user-guide/managing-piped/runtime-options.md
+++ b/docs/content/en/docs-v0.48.x/user-guide/managing-piped/runtime-options.md
@@ -17,6 +17,7 @@ Usage:
 Flags:
       --add-login-user-to-passwd                   Whether to add login user to $HOME/passwd. This is typically for applications running as a random user ID.
       --admin-port int                             The port number used to run a HTTP server for admin tasks such as metrics, healthz. (default 9085)
+      --app-manifest-cache-count int               The number of app manifests to cache. The cache-key contains the commit hash. The default is 150. (default 150)
       --cert-file string                           The path to the TLS certificate file.
       --config-aws-secret string                   The ARN of secret that contains Piped config and be stored in AWS Secrets Manager.
       --config-data string                         The base64 encoded string of the configuration data.