diff --git a/artiq/firmware/Cargo.lock b/artiq/firmware/Cargo.lock
index 3628a5b53..0cb9aef5b 100644
--- a/artiq/firmware/Cargo.lock
+++ b/artiq/firmware/Cargo.lock
@@ -15,28 +15,28 @@ dependencies = [
 
 [[package]]
 name = "bitflags"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "board"
 version = "0.0.0"
 dependencies = [
- "bitflags 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "build_artiq 0.0.0",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "build_artiq"
 version = "0.0.0"
 dependencies = [
- "walkdir 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "walkdir 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "byteorder"
-version = "1.0.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -44,7 +44,7 @@ name = "compiler_builtins"
 version = "0.1.0"
 source = "git+https://github.com/rust-lang-nursery/compiler-builtins?rev=631b568#631b5687b24af413fdbffa4c2644484e60660b00"
 dependencies = [
- "gcc 0.3.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-cfg 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -58,8 +58,8 @@ name = "drtioaux"
 version = "0.0.0"
 dependencies = [
  "board 0.0.0",
- "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "std_artiq 0.0.0",
 ]
 
@@ -72,12 +72,12 @@ name = "fringe"
 version = "1.1.0"
 source = "git+https://github.com/m-labs/libfringe?rev=bd23494#bd2349467157969324ca7da5d2ae033c7ffac0c0"
 dependencies = [
- "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "gcc"
-version = "0.3.42"
+version = "0.3.54"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -97,7 +97,7 @@ dependencies = [
  "amp 0.0.0",
  "board 0.0.0",
  "build_artiq 0.0.0",
- "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "cslice 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "dyld 0.0.0",
  "proto 0.0.0",
@@ -106,12 +106,12 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.18"
+version = "0.2.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "log"
-version = "0.3.6"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -124,7 +124,7 @@ name = "logger_artiq"
 version = "0.0.0"
 dependencies = [
  "board 0.0.0",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "log_buffer 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -137,10 +137,10 @@ source = "git+https://github.com/m-labs/rust-managed.git?rev=629a6786a1cf1692015
 name = "proto"
 version = "0.0.0"
 dependencies = [
- "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "cslice 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "dyld 0.0.0",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "std_artiq 0.0.0",
 ]
 
@@ -152,15 +152,15 @@ dependencies = [
  "amp 0.0.0",
  "board 0.0.0",
  "build_artiq 0.0.0",
- "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "compiler_builtins 0.1.0 (git+https://github.com/rust-lang-nursery/compiler-builtins?rev=631b568)",
  "cslice 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "drtioaux 0.0.0",
  "fringe 1.1.0 (git+https://github.com/m-labs/libfringe?rev=bd23494)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "logger_artiq 0.0.0",
  "proto 0.0.0",
- "smoltcp 0.4.0 (git+https://github.com/m-labs/smoltcp?rev=30012cc)",
+ "smoltcp 0.4.0 (git+https://github.com/m-labs/smoltcp?rev=960b001)",
  "std_artiq 0.0.0",
 ]
 
@@ -169,6 +169,15 @@ name = "rustc-cfg"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "same-file"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "satman"
 version = "0.0.0"
@@ -178,7 +187,7 @@ dependencies = [
  "build_artiq 0.0.0",
  "compiler_builtins 0.1.0 (git+https://github.com/rust-lang-nursery/compiler-builtins?rev=631b568)",
  "drtioaux 0.0.0",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "logger_artiq 0.0.0",
  "std_artiq 0.0.0",
 ]
@@ -186,10 +195,10 @@ dependencies = [
 [[package]]
 name = "smoltcp"
 version = "0.4.0"
-source = "git+https://github.com/m-labs/smoltcp?rev=30012cc#30012cc3b1730f24ced24fc24627b856dc31540b"
+source = "git+https://github.com/m-labs/smoltcp?rev=960b001#960b0012a09d37dde1d86b28bb5531316f606bfd"
 dependencies = [
- "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "managed 0.4.0 (git+https://github.com/m-labs/rust-managed.git?rev=629a6786a1cf1692015f464ed16c04eafa5cb8d1)",
 ]
 
@@ -199,10 +208,11 @@ version = "0.0.0"
 
 [[package]]
 name = "walkdir"
-version = "1.0.3"
+version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "same-file 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -217,19 +227,20 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [metadata]
-"checksum bitflags 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f5cde24d1b2e2216a726368b2363a273739c91f4e3eb4e0dd12d672d396ad989"
-"checksum byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c40977b0ee6b9885c9013cd41d9feffdd22deb3bb4dc3a71d901cc7a77de18c8"
+"checksum bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b3c30d3802dfb7281680d6285f2ccdaa8c2d8fee41f93805dba5c4cf50dc23cf"
+"checksum byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "652805b7e73fada9d85e9a6682a4abd490cb52d96aeecc12e33a0de34dfd0d23"
 "checksum compiler_builtins 0.1.0 (git+https://github.com/rust-lang-nursery/compiler-builtins?rev=631b568)" = "<none>"
 "checksum cslice 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0f8cb7306107e4b10e64994de6d3274bd08996a7c1322a27b86482392f96be0a"
 "checksum fringe 1.1.0 (git+https://github.com/m-labs/libfringe?rev=bd23494)" = "<none>"
-"checksum gcc 0.3.42 (registry+https://github.com/rust-lang/crates.io-index)" = "291055c78f59ca3d84c99026c9501c469413d386bb46be1e1cf1d285cd1db3b0"
+"checksum gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)" = "5e33ec290da0d127825013597dbdfc28bee4964690c7ce1166cbc2a7bd08b1bb"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
-"checksum libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)" = "a51822fc847e7a8101514d1d44e354ba2ffa7d4c194dcab48870740e327cac70"
-"checksum log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "ab83497bf8bf4ed2a74259c1c802351fcd67a65baa86394b6ba73c36f4838054"
+"checksum libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)" = "36fbc8a8929c632868295d0178dd8f63fc423fd7537ad0738372bd010b3ac9b0"
+"checksum log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "880f77541efa6e5cc74e76910c9884d9859683118839d6a1dc3b11e63512565b"
 "checksum log_buffer 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ec57723b84bbe7bdf76aa93169c9b59e67473317c6de3a83cb2a0f8ccb2aa493"
 "checksum managed 0.4.0 (git+https://github.com/m-labs/rust-managed.git?rev=629a6786a1cf1692015f464ed16c04eafa5cb8d1)" = "<none>"
 "checksum rustc-cfg 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "56a596b5718bf5e059d59a30af12f7f462a152de147aa462b70892849ee18704"
-"checksum smoltcp 0.4.0 (git+https://github.com/m-labs/smoltcp?rev=30012cc)" = "<none>"
-"checksum walkdir 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "dd7c16466ecc507c7cb5988db03e6eab4aaeab89a5c37a29251fcfd3ac9b7afe"
+"checksum same-file 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d931a44fdaa43b8637009e7632a02adc4f2b2e0733c08caa4cf00e8da4a117a7"
+"checksum smoltcp 0.4.0 (git+https://github.com/m-labs/smoltcp?rev=960b001)" = "<none>"
+"checksum walkdir 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)" = "bb08f9e670fab86099470b97cd2b252d6527f0b3cc1401acdb595ffc9dd288ff"
 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
diff --git a/artiq/firmware/runtime/Cargo.toml b/artiq/firmware/runtime/Cargo.toml
index 3ff82710b..4a820e33d 100644
--- a/artiq/firmware/runtime/Cargo.toml
+++ b/artiq/firmware/runtime/Cargo.toml
@@ -37,6 +37,6 @@ features = ["alloc"]
 
 [dependencies.smoltcp]
 git = "https://github.com/m-labs/smoltcp"
-rev = "30012cc"
+rev = "960b001"
 default-features = false
 features = ["alloc", "log", "socket-tcp"]
diff --git a/artiq/firmware/runtime/lib.rs b/artiq/firmware/runtime/lib.rs
index feaf39992..805c52a22 100644
--- a/artiq/firmware/runtime/lib.rs
+++ b/artiq/firmware/runtime/lib.rs
@@ -150,9 +150,14 @@ fn startup_ethernet() {
     let net_device = unsafe { ethmac::EthernetDevice::new() };
     // let net_device = smoltcp::phy::EthernetTracer::new(net_device, _net_trace_writer);
     let mut neighbor_cache_storage = [None; 8];
-    let neighbor_cache = smoltcp::iface::NeighborCache::new(&mut neighbor_cache_storage[..]);
-    let mut interface  = smoltcp::iface::EthernetInterface::new(
-        net_device, neighbor_cache, hardware_addr, [IpCidr::new(protocol_addr, 0)], None);
+    let neighbor_cache =
+        smoltcp::iface::NeighborCache::new(&mut neighbor_cache_storage[..]);
+    let mut interface  =
+        smoltcp::iface::EthernetInterfaceBuilder::new(net_device)
+                       .neighbor_cache(neighbor_cache)
+                       .ethernet_addr(hardware_addr)
+                       .ip_addrs([IpCidr::new(protocol_addr, 0)])
+                       .finalize();
 
     let mut scheduler = sched::Scheduler::new();
     let io = scheduler.io();