diff --git a/waku/waku_rln_relay/group_manager/on_chain/group_manager.nim b/waku/waku_rln_relay/group_manager/on_chain/group_manager.nim
index 4cb7fdbc9..0a20b4304 100644
--- a/waku/waku_rln_relay/group_manager/on_chain/group_manager.nim
+++ b/waku/waku_rln_relay/group_manager/on_chain/group_manager.nim
@@ -498,3 +498,13 @@ method init*(g: OnchainGroupManager): Future[GroupManagerResult[void]] {.async.}
   g.initialized = true
 
   return ok()
+
+method stop*(g: OnchainGroupManager): Future[void] {.async, gcsafe.} =
+  if g.ethRpc.isSome():
+    g.ethRpc.get().ondisconnect = nil
+    await g.ethRpc.get().close()
+  let flushed = g.rlnInstance.flush()
+  if not flushed:
+    error "failed to flush to the tree db"
+
+  g.initialized = false