diff --git a/Cargo.lock b/Cargo.lock
index 6f2f51d..0b93890 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3405,9 +3405,9 @@ dependencies = [
 
 [[package]]
 name = "heapless"
-version = "0.8.0"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0bfb9eb618601c89945a70e254898da93b13be0388091d42117462b265bb3fad"
+checksum = "b1edcd5a338e64688fbdcb7531a846cfd3476a54784dcb918a0844682bc7ada5"
 dependencies = [
  "hash32",
  "stable_deref_trait",
@@ -7897,8 +7897,7 @@ dependencies = [
 [[package]]
 name = "smoltcp"
 version = "0.12.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dad095989c1533c1c266d9b1e8d70a1329dd3723c3edac6d03bbd67e7bf6f4bb"
+source = "git+https://github.com/smoltcp-rs/smoltcp.git?rev=0a926767a68bc88d5512afefa7529c5ecdade4ea#0a926767a68bc88d5512afefa7529c5ecdade4ea"
 dependencies = [
  "bitflags 1.3.2",
  "byteorder",
diff --git a/easytier/Cargo.toml b/easytier/Cargo.toml
index 59b008f..d5524fb 100644
--- a/easytier/Cargo.toml
+++ b/easytier/Cargo.toml
@@ -164,7 +164,7 @@ mimalloc = { version = "*", optional = true }
 # mips
 atomic-shim = "0.2.0"
 
-smoltcp = { version = "0.12.0", optional = true, default-features = false, features = [
+smoltcp = { git = "https://github.com/smoltcp-rs/smoltcp.git", rev = "0a926767a68bc88d5512afefa7529c5ecdade4ea", optional = true, default-features = false, features = [
     "std",
     "medium-ip",
     "proto-ipv4",