diff --git a/luci-app-mosdns/Makefile b/luci-app-mosdns/Makefile
index b1c497f..f1d59cc 100644
--- a/luci-app-mosdns/Makefile
+++ b/luci-app-mosdns/Makefile
@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=luci-app-mosdns
-PKG_VERSION:=1.5.3
+PKG_VERSION:=1.5.4
 PKG_RELEASE:=1
 
 LUCI_TITLE:=LuCI Support for mosdns
@@ -15,6 +15,14 @@ define Package/$(PKG_NAME)/conffiles
 /etc/mosdns/rule
 endef
 
+define Package/$(PKG_NAME)/postinst
+#!/bin/sh
+[ -n "${IPKG_INSTROOT}" ] || {
+	sysctl -p /etc/sysctl.d/20-mosdns-buffer-increase.conf
+	exit 0
+}
+endef
+
 include $(TOPDIR)/feeds/luci/luci.mk
 
 # call BuildPackage - OpenWrt buildroot signature
diff --git a/luci-app-mosdns/root/etc/sysctl.d/20-mosdns-buffer-increase.conf b/luci-app-mosdns/root/etc/sysctl.d/20-mosdns-buffer-increase.conf
new file mode 100644
index 0000000..18f2527
--- /dev/null
+++ b/luci-app-mosdns/root/etc/sysctl.d/20-mosdns-buffer-increase.conf
@@ -0,0 +1,5 @@
+# Do not edit, changes to this file will be lost on upgrades
+# /etc/sysctl.conf can be used to customize sysctl settings
+
+net.core.rmem_max=4194304
+net.core.wmem_max=4194304