diff --git a/Cargo.lock b/Cargo.lock
index c8e46cf9181..4d1cb0d8f5f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2941,9 +2941,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.10.0"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87f3e037eac156d1775da914196f0f37741a274155e34a0b7e427c35d2a2ecb9"
+checksum = "7709cef83f0c1f58f666e746a08b21e0085f7440fa6a29cc194d68aac97a4225"
 
 [[package]]
 name = "oorandom"
@@ -4715,9 +4715,9 @@ dependencies = [
 
 [[package]]
 name = "smoltcp"
-version = "0.8.0"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2308a1657c8db1f5b4993bab4e620bdbe5623bd81f254cf60326767bb243237"
+checksum = "72165c4af59f5f19c7fb774b88b95660591b612380305b5f4503157341a9f7ee"
 dependencies = [
  "bitflags",
  "byteorder",
@@ -5547,7 +5547,7 @@ version = "1.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "97fee6b57c6a41524a810daee9286c02d7752c4253064d0b05472833a438f675"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
  "rand 0.8.5",
  "static_assertions",
 ]
diff --git a/gateway-sp-comms/Cargo.toml b/gateway-sp-comms/Cargo.toml
index 4a5d999521e..ff6dfdf3749 100644
--- a/gateway-sp-comms/Cargo.toml
+++ b/gateway-sp-comms/Cargo.toml
@@ -29,5 +29,5 @@ version = "1.18"
 features = [ "full" ]
 
 [dev-dependencies]
-once_cell = "1.9"
+once_cell = "1.12"
 omicron-test-utils = { path = "../test-utils" }