diff --git a/Cargo.lock b/Cargo.lock
index 2b17a6acbaa69..e8bab0744484b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -543,6 +543,7 @@ version = "0.23.0"
 dependencies = [
  "curl 0.4.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "http 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.82 (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 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1093,6 +1094,16 @@ dependencies = [
  "syn 0.15.22 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "http"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bytes 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "humantime"
 version = "1.2.0"
@@ -4038,6 +4049,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "805026a5d0141ffc30abb3be3173848ad46a1b1664fe632428479619a3644d77"
 "checksum home 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "80dff82fb58cfbbc617fb9a9184b010be0529201553cda50ad04372bc2333aff"
 "checksum html5ever 0.22.5 (registry+https://github.com/rust-lang/crates.io-index)" = "c213fa6a618dc1da552f54f85cba74b05d8e883c92ec4e89067736938084c26e"
+"checksum http 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)" = "fe67e3678f2827030e89cc4b9e7ecd16d52f132c0b940ab5005f88e821500f6a"
 "checksum humantime 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3ca7e5f2e110db35f93b837c81797f3714500b81d517bf20c431b16d3ca4f114"
 "checksum idna 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "38f09e0f0b1fb55fdee1f17470ad800da77af5186a1a76c026b679358b7e844e"
 "checksum if_chain 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "4bac95d9aa0624e7b78187d6fb8ab012b41d9f6f54b1bcb61e61c4845f8357ec"
diff --git a/src/tools/cargo b/src/tools/cargo
index 436f2902fd59e..6789d8a0a54a9 160000
--- a/src/tools/cargo
+++ b/src/tools/cargo
@@ -1 +1 @@
-Subproject commit 436f2902fd59e580c730c76c65b7d74222f8c304
+Subproject commit 6789d8a0a54a96d95365c4e1fb01d47a5eed9937