diff --git a/socketserver/server/handlecore.go b/socketserver/server/handlecore.go
index 9cac001c..905dde04 100644
--- a/socketserver/server/handlecore.go
+++ b/socketserver/server/handlecore.go
@@ -186,7 +186,7 @@ func HTTPSayOK(w http.ResponseWriter, _ *http.Request) {
 
 // SocketUpgrader is the websocket.Upgrader currently in use.
 var SocketUpgrader = websocket.Upgrader{
-	ReadBufferSize:  1024,
+	ReadBufferSize:  160,
 	WriteBufferSize: 1024,
 	CheckOrigin: func(r *http.Request) bool {
 		return r.Header.Get("Origin") == "" || OriginRegexp.MatchString(r.Header.Get("Origin"))
diff --git a/socketserver/server/stats.go b/socketserver/server/stats.go
index b4274997..8455fa8f 100644
--- a/socketserver/server/stats.go
+++ b/socketserver/server/stats.go
@@ -12,6 +12,8 @@ import (
 )
 
 type StatsData struct {
+	updateMu sync.Mutex
+
 	StatsDataVersion int
 
 	StartTime time.Time
@@ -114,6 +116,9 @@ func SetBuildStamp(buildTime, buildHash string) {
 }
 
 func updateStatsIfNeeded() {
+	Statistics.updateMu.Lock()
+	defer Statistics.updateMu.Unlock()
+
 	if time.Now().Add(-2 * time.Second).After(Statistics.CachedStatsLastUpdate) {
 		updatePeriodicStats()
 	}