diff --git a/howto/cache.md b/howto/cache.md
index 98ac42f99823df3653dc22aafbca3c95f3b9844f..5164d0d43f5b892a29d7e370e2fbc9750ea94e1a 100644
--- a/howto/cache.md
+++ b/howto/cache.md
@@ -1043,7 +1043,10 @@ There are two solutions to work around this problem:
  * use a third-party module like [vts](https://github.com/vozlt/nginx-module-vts) or [sts](https://github.com/vozlt/nginx-module-sts) and the
    [exporter](https://github.com/hnlq715/nginx-vts-exporter) to expose those metrics - the vts module doesn't seem
    to be very well maintained (no release since 2018) and it's unclear
-   if this will work for our use case
+   if this will work for our use case. Update: the vts module seems
+   better maintained now and has Prometheus metrics support, the
+   [nginx-vts-exporter](https://github.com/sysulq/nginx-vts-exporter) is marked as deprecated. A [RFP for the
+   module was filed](https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1068764). There is also a [lua-based exporter](https://github.com/knyar/nginx-lua-prometheus).
 
 Here's an example of how to do the mtail hack. First tell nginx to
 write to syslog, to act as a buffer, so that parsing doesn't slow