diff --git a/docs/operator-manual/custom_tools.md b/docs/operator-manual/custom_tools.md
index 9f7483db7ea89..8e1d6f963f5b3 100644
--- a/docs/operator-manual/custom_tools.md
+++ b/docs/operator-manual/custom_tools.md
@@ -51,7 +51,7 @@ following example builds an entirely customized repo-server from a Dockerfile, i
 dependencies that may be needed for generating manifests.
 
 ```Dockerfile
-FROM argoproj/argocd:latest
+FROM argoproj/argocd:v2.5.4 # Replace tag with the appropriate argo version
 
 # Switch to root for the ability to perform install
 USER root