diff --git a/system/README.md b/system/README.md
index 094e236..795a14d 100644
--- a/system/README.md
+++ b/system/README.md
@@ -4,6 +4,7 @@ List of NixOS modules
   - bitcoind
   - electrs
   - fulcrum
+  - mempool
   - joinmarket
     - joinmarket-ob-watcher
   - btcpayserver