diff --git a/Cargo.lock b/Cargo.lock
index 2a03245e..4f0958f3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -355,8 +355,8 @@ dependencies = [
  "glutin 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "png 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rusttype 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.20 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -595,7 +595,7 @@ name = "ron"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "serde 1.0.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -615,15 +615,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde"
-version = "1.0.20"
+version = "1.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "serde_derive 1.0.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.20"
+version = "1.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -906,8 +906,8 @@ dependencies = [
  "rancor 0.1.0",
  "rand 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "ron 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.20 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [metadata]
@@ -986,8 +986,8 @@ dependencies = [
 "checksum ron 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b38058ab7559210bd7dd8a5d695317e18657569b4a135a986cd87259feca2e56"
 "checksum rusttype 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "30047cc747a78ae042bf2cd65c79f83c3485d90107535b532d6e8f60e2c89cb1"
 "checksum serde 0.9.15 (registry+https://github.com/rust-lang/crates.io-index)" = "34b623917345a631dc9608d5194cc206b3fe6c3554cd1c75b937e55e285254af"
-"checksum serde 1.0.20 (registry+https://github.com/rust-lang/crates.io-index)" = "5a2b181dd2b4a6353e828e44807269a761d3ecbc388a1f5ed3998ea69a516d9c"
-"checksum serde_derive 1.0.20 (registry+https://github.com/rust-lang/crates.io-index)" = "31ce3c16ec18abb97d977f75880986549213b0c18f2695eda8b31eadc96eda4a"
+"checksum serde 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)" = "6eda663e865517ee783b0891a3f6eb3a253e0b0dabb46418969ee9635beadd9e"
+"checksum serde_derive 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)" = "652bc323d694dc925829725ec6c890156d8e70ae5202919869cb00fe2eff3788"
 "checksum serde_derive_internals 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)" = "32f1926285523b2db55df263d2aa4eb69ddcfa7a7eade6430323637866b513ab"
 "checksum serde_json 0.9.10 (registry+https://github.com/rust-lang/crates.io-index)" = "ad8bcf487be7d2e15d3d543f04312de991d631cfe1b43ea0ade69e6a8a5b16a1"
 "checksum shared_library 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "7822f9d0814224552cfd7e4ac72cd511740ccec0b811d1c0f9fa2a84c6509cee"