diff --git a/quicp2p.nim b/quicp2p.nim
index 051fe2d..315f751 100644
--- a/quicp2p.nim
+++ b/quicp2p.nim
@@ -172,7 +172,9 @@ proc initContext(sock: AsyncSocket, certChainPath: string, keyPath: string,
   result.tlsCtx.signCertificate = addr result.signCertificate.super
 
 proc sendPackets(ctx: QuicP2PContext) =
-  let conns = ctx.connections
+  if ctx.connections.len == 0:
+    return
+  let conns = ctx.connections.deepCopy()
   for i in 0 .. conns.len - 1:
     var srcAddr, dstAddr: quicly_address_t
     var dgrams: array[10, IOVec]