diff --git a/Cargo.lock b/Cargo.lock
index c79e70b..1b96ce3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -14,15 +14,15 @@ checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
 [[package]]
 name = "byteorder"
-version = "1.4.2"
+version = "1.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae44d1a3d5a19df61dd0c8beb138458ac2a53a7ac09eba97d55592540004306b"
+checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
 
 [[package]]
 name = "cc"
-version = "1.0.66"
+version = "1.0.68"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c0496836a84f8d0495758516b8621a622beb77c0fed418570e50764093ced48"
+checksum = "4a72c244c1ff497a746a7e1fb3d14bd08420ecda70c8f25c7112f2781652d787"
 
 [[package]]
 name = "cfg-if"
@@ -45,9 +45,9 @@ dependencies = [
 
 [[package]]
 name = "embedded-hal"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa998ce59ec9765d15216393af37a58961ddcefb14c753b4816ba2191d865fcb"
+checksum = "db184d3fa27bc7a2344250394c0264144dfe0bc81a4401801dcb964b8dd172ad"
 dependencies = [
  "nb 0.1.3",
  "void",
@@ -169,9 +169,9 @@ checksum = "c75de51135344a4f8ed3cfe2720dc27736f7711989703a0b43aadf3753c55577"
 
 [[package]]
 name = "memchr"
-version = "2.3.4"
+version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
+checksum = "b16bd47d9e329435e309c58469fe0791c2d0d1ba96ec0954152a5ae2b04387dc"
 
 [[package]]
 name = "nb"
@@ -202,9 +202,9 @@ checksum = "bd7a31eed1591dcbc95d92ad7161908e72f4677f8fabf2a32ca49b4237cbf211"
 
 [[package]]
 name = "smoltcp"
-version = "0.7.0"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab527c390c7e107f687bd92a886a083fde61b8cdc700b37f3d7e4346ffd8fae1"
+checksum = "11b5647cc4676e9358e6b15b6536b34e5b413e5ae946a06b3f85e713132bcdfa"
 dependencies = [
  "bitflags",
  "byteorder",
diff --git a/default.nix b/default.nix
index dc0d85a..c672942 100644
--- a/default.nix
+++ b/default.nix
@@ -2,8 +2,8 @@ let
   pkgs = import <nixpkgs> { overlays = [ (import ./nix/mozilla-overlay.nix) ]; };
   rustPlatform = (import ./nix/rust-platform.nix { inherit pkgs; });
   cargo-xbuild = (pkgs.cargo-xbuild.overrideAttrs(oa: { patches = oa.patches ++ [ ./xbuild_writable_lockfile.diff ]; } ));
-  cargoSha256Experiments = "107zc5n5xgzpw9i4j7r40pzl5pihlkmzx2gy934fhb6ybkfz9rnx";
-  cargoSha256SZL = "1vvn8c6nxl6p8sib19d0ah1kbimh48p86c8pjb878day4d1irbdl";
+  cargoSha256Experiments = "18030nks0c4i71h589vcr4x4290h6bab1gri86k0anbg2pl31dwa";
+  cargoSha256SZL = "1r4qylfpikmd48kd5nibp25j1pyknf70s6rahdzhx6bfskd1xdhb";
   build-crate = name: crate: features: cargoSha256:
     rustPlatform.buildRustPackage rec {
       name = "${crate}";