diff --git a/Cargo.toml b/Cargo.toml
index 270be88..093acb6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ license = "BSD-2-Clause"
 volatile-register = "0.2"
 aligned = "0.3"
 embedded-hal = "0.2"
-smoltcp = { version = "0.6.0", default-features = false, features = ["proto-ipv4", "proto-ipv6", "socket-icmp", "socket-udp", "socket-tcp", "log", "verbose", "ethernet"], optional = true }
+smoltcp = { version = "0.7.0", default-features = false, features = ["proto-ipv4", "proto-ipv6", "socket-icmp", "socket-udp", "socket-tcp", "log", "verbose", "ethernet"], optional = true }
 # Optional dependencies for building examples
 stm32f4xx-hal = { version = "0.8", optional = true }
 cortex-m = { version = "0.5", optional = true }
diff --git a/src/nal.rs b/src/nal.rs
index 7312cb0..0204037 100644
--- a/src/nal.rs
+++ b/src/nal.rs
@@ -21,35 +21,33 @@ pub enum NetworkError {
 }
 
 pub type NetworkInterface<SPI, NSS, Delay> = net::iface::EthernetInterface<
-    'static,
-    'static,
     'static,
     crate::smoltcp_phy::SmoltcpDevice<
         crate::SpiEth<SPI, NSS, Delay>
     >,
 >;
 
-pub struct NetworkStack<'a, 'b, 'c, SPI, NSS, Delay>
+pub struct NetworkStack<'a, SPI, NSS, Delay>
 where
     SPI: 'static + Transfer<u8>,
     NSS: 'static + OutputPin,
     Delay: 'static + DelayUs<u16>
 {
     network_interface: RefCell<NetworkInterface<SPI, NSS, Delay>>,
-    sockets: RefCell<net::socket::SocketSet<'a, 'b, 'c>>,
+    sockets: RefCell<net::socket::SocketSet<'a>>,
     next_port: RefCell<u16>,
     unused_handles: RefCell<Vec<net::socket::SocketHandle, consts::U16>>,
     time_ms: RefCell<u32>,
     last_update_instant: RefCell<Option<Instant>>,
 }
 
-impl<'a, 'b, 'c, SPI, NSS, Delay> NetworkStack<'a, 'b, 'c, SPI, NSS, Delay>
+impl<'a, SPI, NSS, Delay> NetworkStack<'a, SPI, NSS, Delay>
 where
     SPI: Transfer<u8>,
     NSS: OutputPin,
     Delay: DelayUs<u16>
 {
-    pub fn new(interface: NetworkInterface<SPI, NSS, Delay>, sockets: net::socket::SocketSet<'a, 'b, 'c>) -> Self {
+    pub fn new(interface: NetworkInterface<SPI, NSS, Delay>, sockets: net::socket::SocketSet<'a>) -> Self {
         let mut unused_handles: Vec<net::socket::SocketHandle, consts::U16> = Vec::new();
         for socket in sockets.iter() {
             unused_handles.push(socket.handle()).unwrap();
@@ -115,7 +113,7 @@ where
     }
 }
 
-impl<'a, 'b, 'c, SPI, NSS, Delay> nal::TcpStack for NetworkStack<'a, 'b, 'c, SPI, NSS, Delay>
+impl<'a, SPI, NSS, Delay> nal::TcpStack for NetworkStack<'a, SPI, NSS, Delay>
 where
     SPI: Transfer<u8>,
     NSS: OutputPin,