diff --git a/Cargo.lock b/Cargo.lock
index cb1e3d4d1d37f..451787cd00014 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -281,7 +281,7 @@ dependencies = [
  "pretty_env_logger 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-workspace-hack 1.0.0",
- "rustfix 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustfix 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "same-file 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -477,7 +477,7 @@ dependencies = [
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "miow 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustfix 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustfix 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "walkdir 2.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -496,7 +496,7 @@ dependencies = [
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "miow 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustfix 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustfix 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3263,13 +3263,12 @@ dependencies = [
 
 [[package]]
 name = "rustfix"
-version = "0.4.4"
+version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -4600,7 +4599,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)" = "dcf128d1287d2ea9d80910b5f1120d0b8eede3fbf1abe91c40d39ea7d51e6fda"
 "checksum rustc_tools_util 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b725dadae9fabc488df69a287f5a99c5eaf5d10853842a8a3dfac52476f544ee"
 "checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
-"checksum rustfix 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "af7c21531a91512a4a51b490be6ba1c8eff34fdda0dc5bf87dc28d86748aac56"
+"checksum rustfix 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "7150ac777a2931a53489f5a41eb0937b84e3092a20cd0e73ad436b65b507f607"
 "checksum ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c92464b447c0ee8c4fb3824ecc8383b81717b9f1e74ba2e72540aef7b9f82997"
 "checksum same-file 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8f20c4be53a8a1ff4c1f1b2bd14570d2f634628709752f0702ecdd2b3f9a5267"
 "checksum schannel 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "0e1a231dc10abf6749cfa5d7767f25888d484201accbd919b66ab5413c502d56"
diff --git a/src/tools/cargo b/src/tools/cargo
index 26092da337b94..42a8c0adf9132 160000
--- a/src/tools/cargo
+++ b/src/tools/cargo
@@ -1 +1 @@
-Subproject commit 26092da337b948719549cd5ed3d1051fd847afd7
+Subproject commit 42a8c0adf91323c01228268c651aef5366b25b69