diff --git a/Cargo.toml b/Cargo.toml
index 3680271..74875d3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ cortex-m-log = { version = "0.7.0", features = ["log-integration", "semihosting"
 stm32f4xx-hal = { version = "0.20.0", features = ["stm32f407", "otg-fs", "usb_fs"] }
 stm32-eth = { version = "0.6.0", features = ["stm32f407", "smoltcp-phy", "smoltcp"] }
 ieee802_3_miim = "0.8.0"
-smoltcp = { version = "0.11.0", default-features = false, features = ["proto-ipv4", "socket-tcp", "log", "medium-ethernet"] }
+smoltcp = { version = "0.11.0", default-features = false, features = ["proto-ipv4", "socket-tcp", "log", "medium-ethernet", "iface-neighbor-cache-count-16"] }
 uom = { version = "0.30", default-features = false, features = ["autoconvert", "si", "f32", "use_serde"] }
 num-traits = { version = "0.2.15", default-features = false, features = ["libm"] }
 usb-device = "0.3.2"