diff --git a/Cargo.lock b/Cargo.lock
index e32c0a3..1f3ba6c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -250,7 +250,6 @@ dependencies = [
  "scpi",
  "smoltcp",
  "stm32h7xx-hal",
- "uom 0.29.0",
 ]
 
 [[package]]
@@ -619,7 +618,7 @@ dependencies = [
  "lexical-core",
  "libm",
  "scpi_derive",
- "uom 0.28.0",
+ "uom",
 ]
 
 [[package]]
@@ -680,8 +679,7 @@ dependencies = [
 [[package]]
 name = "smoltcp"
 version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fe46639fd2ec79eadf8fe719f237a7a0bd4dac5d957f1ca5bbdbc1c3c39e53a"
+source = "git+https://github.com/smoltcp-rs/smoltcp.git#bdfa44270e9c59b3095b555cdf14601f7dc27794"
 dependencies = [
  "bitflags",
  "byteorder",
@@ -798,16 +796,6 @@ dependencies = [
  "typenum",
 ]
 
-[[package]]
-name = "uom"
-version = "0.29.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8bb593f5252356bfb829112f8fca2d0982d48588d2d6bb5a92553b0dfc4c9aba"
-dependencies = [
- "num-traits",
- "typenum",
-]
-
 [[package]]
 name = "url"
 version = "2.1.1"
diff --git a/Cargo.toml b/Cargo.toml
index 104593e..7c06b86 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -33,16 +33,8 @@ branch = "issue-4"
 default-features = false
 features = [ "build-info", "unit-frequency", "unit-angle" ]
 
-[dependencies.uom]
-version = "0.29.0"
-default-features = false
-features = [ "autoconvert", "f32", "f64", "si" ]
-
-# Use below SCPI dependency when need to modify SCPI fork offline
-# [dependencies.scpi]
-# path = "../scpi-fork/scpi"
-# default-features = false
-# features = [ "build-info", "unit-frequency" ]
+[patch.crates-io]
+smoltcp = { git = "https://github.com/smoltcp-rs/smoltcp.git" }
 
 [[example]]
 name = "ethernet"