diff --git a/Cargo.lock b/Cargo.lock
index baa1b3b84..cf1583d63 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -597,7 +597,7 @@ dependencies = [
 
 [[package]]
 name = "dtoa"
-version = "0.4.3"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -2095,7 +2095,7 @@ name = "serde_urlencoded"
 version = "0.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "dtoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "dtoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.91 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2106,7 +2106,7 @@ name = "serde_yaml"
 version = "0.8.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "dtoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "dtoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "linked-hash-map 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.91 (registry+https://github.com/rust-lang/crates.io-index)",
  "yaml-rust 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3456,7 +3456,7 @@ dependencies = [
 "checksum digest 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)" = "03b072242a8cbaf9c145665af9d250c59af3b958f83ed6824e13533cf76d5b90"
 "checksum digest 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "05f47366984d3ad862010e22c7ce81a7dbcaebbdfb37241a620f8b6596ee135c"
 "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 dtoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "ea57b42383d091c85abcc2706240b94ab2a8fa1fc81c10ff23c4de06e2a90b5e"
 "checksum ed25519-dalek 1.0.0-pre.1 (registry+https://github.com/rust-lang/crates.io-index)" = "81956bcf7ef761fb4e1d88de3fa181358a0d26cbcb9755b587a08f9119824b86"
 "checksum either 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c67353c641dc847124ea1902d69bd753dee9bb3beff9aa3662ecf86c971d1fac"
 "checksum elf 0.0.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4841de15dbe0e49b9b62a417589299e3be0d557e0900d36acb87e6dae47197f5"