diff --git a/Cargo.lock b/Cargo.lock
index 8b86906e67..20e2071303 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -355,7 +355,7 @@ name = "download"
 version = "0.6.0"
 dependencies = [
  "curl 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)",
- "env_proxy 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "env_proxy 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "error-chain 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper 0.12.27 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -380,7 +380,7 @@ dependencies = [
 
 [[package]]
 name = "env_proxy"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1924,7 +1924,7 @@ dependencies = [
 "checksum dirs 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "3fd78930633bd1c6e35c4b42b1df7b0cbc6bc191146e512bb3bedf243fcc3901"
 "checksum dtoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6d301140eb411af13d3115f9a562c85cc6b541ade9dfa314132244aaee7489dd"
 "checksum encoding_rs 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)" = "4155785c79f2f6701f185eb2e6b4caf0555ec03477cb4c70db67b465311620ed"
-"checksum env_proxy 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d1be90999077d0d3fc3d4c96aa098cfc3b414ee25bff87423afa055c4a115af8"
+"checksum env_proxy 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "700798562fcbc0a4c89546df5dfa8586e82345026e3992242646d527dec948e4"
 "checksum error-chain 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "07e791d3be96241c77c43846b665ef1384606da2cd2a48730abe606a12906e02"
 "checksum failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "795bd83d3abeb9220f257e597aa0080a508b27533824adf336529648f6abf7e2"
 "checksum failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "ea1063915fd7ef4309e222a5a07cf9c319fb9c7836b1f89b85458672dbb127e1"
diff --git a/download/Cargo.toml b/download/Cargo.toml
index 7bbbd708e9..844c02713a 100644
--- a/download/Cargo.toml
+++ b/download/Cargo.toml
@@ -18,7 +18,7 @@ reqwest-backend = ["reqwest", "env_proxy", "lazy_static"]
 error-chain = "0.12"
 url = "1.7"
 curl = { version = "0.4.11", optional = true }
-env_proxy = { version = "0.3.0", optional = true }
+env_proxy = { version = "0.3.1", optional = true }
 lazy_static = { version = "1.0", optional = true }
 reqwest = { version = "0.9.14", features = ["socks"], optional = true }