diff --git a/internal/grid/connection.go b/internal/grid/connection.go
index 30d35edf2..2203c9580 100644
--- a/internal/grid/connection.go
+++ b/internal/grid/connection.go
@@ -899,7 +899,6 @@ func (c *Connection) handleMessages(ctx context.Context, conn net.Conn) {
 					}
 					continue
 				}
-
 				if int64(cap(dst)) < hdr.Length+1 {
 					dst = make([]byte, 0, hdr.Length+hdr.Length>>3)
 				}
@@ -914,6 +913,10 @@ func (c *Connection) handleMessages(ctx context.Context, conn net.Conn) {
 				cancel(ErrDisconnected)
 				return
 			}
+			if cap(msg) > readBufferSize*8 {
+				// Don't keep too much memory around.
+				msg = nil
+			}
 
 			var err error
 			msg, err = readDataInto(msg, conn, c.side, ws.OpBinary)