diff --git a/Cargo.lock b/Cargo.lock
index 9d5c076..e868ed0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -58,7 +58,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.43 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.55 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -280,7 +280,7 @@ dependencies = [
  "num_cpus 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.43 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.55 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-core 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -680,7 +680,7 @@ dependencies = [
  "hyper 0.11.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.43 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.55 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -700,7 +700,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde"
-version = "1.0.43"
+version = "1.0.55"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -730,7 +730,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "dtoa 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "itoa 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.43 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.55 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1048,7 +1048,7 @@ dependencies = [
 "checksum safemem 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e27a8b19b835f7aea908818e871f5cc3a5a186550c30773be987e155e8163d8f"
 "checksum scheduled-thread-pool 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1a2ff3fc5223829be817806c6441279c676e454cc7da608faf03b0ccc09d3889"
 "checksum scoped-tls 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f417c22df063e9450888a7561788e9bd46d3bb3c1466435b4eccb903807f147d"
-"checksum serde 1.0.43 (registry+https://github.com/rust-lang/crates.io-index)" = "0c855d888276f20d140223bd06515e5bf1647fd6d02593cb5792466d9a8ec2d0"
+"checksum serde 1.0.55 (registry+https://github.com/rust-lang/crates.io-index)" = "97f6a6c3caba0cf8f883b53331791036404ce3c1bd895961cf8bb2f8cecfd84b"
 "checksum serde_derive 1.0.43 (registry+https://github.com/rust-lang/crates.io-index)" = "aa113e5fc4b008a626ba2bbd41330b56c9987d667f79f7b243e5a2d03d91ed1c"
 "checksum serde_derive_internals 0.23.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9d30c4596450fd7bbda79ef15559683f9a79ac0193ea819db90000d7e1cae794"
 "checksum serde_json 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)" = "8c6c4e049dc657a99e394bd85c22acbf97356feeec6dbf44150f2dcf79fb3118"