diff --git a/artiq/firmware/Cargo.lock b/artiq/firmware/Cargo.lock
index de1abb72b..5f68ddb78 100644
--- a/artiq/firmware/Cargo.lock
+++ b/artiq/firmware/Cargo.lock
@@ -31,7 +31,7 @@ dependencies = [
  "byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "cc 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "smoltcp 0.4.0 (git+https://github.com/m-labs/smoltcp?rev=92e970b)",
+ "smoltcp 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -42,7 +42,7 @@ dependencies = [
  "build_misoc 0.0.0",
  "byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "crc 1.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "smoltcp 0.4.0 (git+https://github.com/m-labs/smoltcp?rev=92e970b)",
+ "smoltcp 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -216,7 +216,7 @@ dependencies = [
  "logger_artiq 0.0.0",
  "managed 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "proto_artiq 0.0.0",
- "smoltcp 0.4.0 (git+https://github.com/m-labs/smoltcp?rev=92e970b)",
+ "smoltcp 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "unwind_backtrace 0.0.0",
 ]
 
@@ -232,8 +232,8 @@ dependencies = [
 
 [[package]]
 name = "smoltcp"
-version = "0.4.0"
-source = "git+https://github.com/m-labs/smoltcp?rev=92e970b#92e970b3798737cfaa2a829d3f1bb7a7353696ee"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -294,7 +294,7 @@ version = "0.0.0"
 "checksum log_buffer 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f033173c9486b7fe97a79c895c0a3483ae395ab6744c985d10078950e2492419"
 "checksum managed 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ba6713e624266d7600e9feae51b1926c6a6a6bebb18ec5a8e11a5f1d5661baba"
 "checksum quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e920b65c65f10b2ae65c831a81a073a89edd28c7cce89475bff467ab4167a"
-"checksum smoltcp 0.4.0 (git+https://github.com/m-labs/smoltcp?rev=92e970b)" = "<none>"
+"checksum smoltcp 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fef582369edb298c6c41319a544ca9c4e83622f226055ccfcb35974fbb55ed34"
 "checksum syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d3b891b9015c88c576343b9b3e41c2c11a51c219ef067b264bd9c8aa9b441dad"
 "checksum synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6"
 "checksum synstructure 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3a761d12e6d8dcb4dcf952a7a89b475e3a9d69e4a69307e01a470977642914bd"
diff --git a/artiq/firmware/bootloader/Cargo.toml b/artiq/firmware/bootloader/Cargo.toml
index be9ab36e9..2a43b72f5 100644
--- a/artiq/firmware/bootloader/Cargo.toml
+++ b/artiq/firmware/bootloader/Cargo.toml
@@ -16,9 +16,4 @@ 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"] }
-
-[dependencies.smoltcp]
-git = "https://github.com/m-labs/smoltcp"
-rev = "92e970b"
-default-features = false
-features = ["proto-ipv4", "socket-tcp"]
+smoltcp = { version = "0.5.0", default-features = false, features = ["proto-ipv4", "socket-tcp"] }
diff --git a/artiq/firmware/libboard_misoc/Cargo.toml b/artiq/firmware/libboard_misoc/Cargo.toml
index aae40b6b1..8847d0a0d 100644
--- a/artiq/firmware/libboard_misoc/Cargo.toml
+++ b/artiq/firmware/libboard_misoc/Cargo.toml
@@ -15,12 +15,7 @@ build_misoc = { path = "../libbuild_misoc" }
 [dependencies]
 byteorder = { version = "1.0", default-features = false }
 log = { version = "0.4", default-features = false, optional = true }
-
-[dependencies.smoltcp]
-git = "https://github.com/m-labs/smoltcp"
-rev = "92e970b" # NB: also change in runtime/Cargo.toml
-default-features = false
-optional = true
+smoltcp = { version = "0.5.0", default-features = false, optional = true }
 
 [features]
 uart_console = []
diff --git a/artiq/firmware/runtime/Cargo.toml b/artiq/firmware/runtime/Cargo.toml
index 1a7da3375..4c187b1ff 100644
--- a/artiq/firmware/runtime/Cargo.toml
+++ b/artiq/firmware/runtime/Cargo.toml
@@ -27,15 +27,10 @@ board_misoc = { path = "../libboard_misoc", features = ["uart_console", "smoltcp
 logger_artiq = { path = "../liblogger_artiq" }
 board_artiq = { path = "../libboard_artiq" }
 proto_artiq = { path = "../libproto_artiq", features = ["log", "alloc"] }
+smoltcp = { version = "0.5.0", default-features = false, features = ["rust-1_28", "alloc", "log", "proto-ipv4", "socket-tcp"] }
 
 [dependencies.fringe]
 git = "https://github.com/m-labs/libfringe"
 rev = "b8a6d8f"
 default-features = false
 features = ["alloc"]
-
-[dependencies.smoltcp]
-git = "https://github.com/m-labs/smoltcp"
-rev = "92e970b" # NB: also change in libboard_misoc/Cargo.toml
-default-features = false
-features = ["rust-1.28", "alloc", "log", "proto-ipv4", "socket-tcp"]