diff --git a/README.md b/README.md
index 3ee6a9c09..70da27fd8 100644
--- a/README.md
+++ b/README.md
@@ -210,6 +210,7 @@ Currently implemented sources:
 * phusion passenger
 * ping
 * postgresql
+* postgresql_extensible
 * powerdns
 * procstat
 * prometheus