diff --git a/artiq/firmware/Cargo.lock b/artiq/firmware/Cargo.lock
index 8e0c7f95a..c6f71926e 100644
--- a/artiq/firmware/Cargo.lock
+++ b/artiq/firmware/Cargo.lock
@@ -371,9 +371,9 @@ checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
 [[package]]
 name = "smoltcp"
-version = "0.8.0"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2308a1657c8db1f5b4993bab4e620bdbe5623bd81f254cf60326767bb243237"
+checksum = "ee34c1e1bfc7e9206cc0fb8030a90129b4e319ab53856249bb27642cab914fb3"
 dependencies = [
  "bitflags",
  "byteorder",
diff --git a/artiq/firmware/bootloader/Cargo.toml b/artiq/firmware/bootloader/Cargo.toml
index 9e5ba820a..ac0df1001 100644
--- a/artiq/firmware/bootloader/Cargo.toml
+++ b/artiq/firmware/bootloader/Cargo.toml
@@ -16,5 +16,5 @@ build_misoc = { path = "../libbuild_misoc" }
 byteorder = { version = "1.0", default-features = false }
 crc = { version = "1.7", default-features = false }
 board_misoc = { path = "../libboard_misoc", features = ["uart_console", "smoltcp"] }
-smoltcp = { version = "0.8.0", default-features = false, features = ["medium-ethernet", "proto-ipv4", "proto-ipv6", "socket-tcp"] }
+smoltcp = { version = "0.8.2", default-features = false, features = ["medium-ethernet", "proto-ipv4", "proto-ipv6", "socket-tcp"] }
 riscv = { version = "0.6.0", features = ["inline-asm"] }
diff --git a/artiq/firmware/libboard_misoc/Cargo.toml b/artiq/firmware/libboard_misoc/Cargo.toml
index 69c1d46d3..7b4951ea7 100644
--- a/artiq/firmware/libboard_misoc/Cargo.toml
+++ b/artiq/firmware/libboard_misoc/Cargo.toml
@@ -15,7 +15,7 @@ build_misoc = { path = "../libbuild_misoc" }
 [dependencies]
 byteorder = { version = "1.0", default-features = false }
 log = { version = "0.4", default-features = false, optional = true }
-smoltcp = { version = "0.8.0", default-features = false, optional = true }
+smoltcp = { version = "0.8.2", default-features = false, optional = true }
 riscv = { version = "0.6.0", features = ["inline-asm"] }
 
 [features]