diff --git a/buildroot-external/rootfs-overlay/etc/sysctl.d/20-network.conf b/buildroot-external/rootfs-overlay/etc/sysctl.d/20-network.conf
index ada27ebe3..da7a27ba5 100644
--- a/buildroot-external/rootfs-overlay/etc/sysctl.d/20-network.conf
+++ b/buildroot-external/rootfs-overlay/etc/sysctl.d/20-network.conf
@@ -1,3 +1,7 @@
 # Since multicast is rather popular and we have many integrations running,
 # more than the default of 20 memberships might be required.
 net.ipv4.igmp_max_memberships = 1024
+
+# Increase maximum receive and send buffer size
+net.core.rmem_max = 4194304
+net.core.wmem_max = 4194304