diff --git a/Cargo.lock b/Cargo.lock
index 3713e24..8d861bb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,7 +3,7 @@ name = "Led"
 version = "0.0.2"
 dependencies = [
  "docopt 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "ropey 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ropey 0.8.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.70 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.70 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -60,7 +60,7 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "0.6.3"
+version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -101,7 +101,7 @@ dependencies = [
 
 [[package]]
 name = "ropey"
-version = "0.8.2"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -118,8 +118,8 @@ version = "1.0.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.14.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.14.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -137,11 +137,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "syn"
-version = "0.14.4"
+version = "0.14.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -209,17 +209,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)" = "b685088df2b950fccadf07a7187c8ef846a959c142338a48f9dc0b94517eb5f1"
 "checksum memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "796fba70e76612589ed2ce7f45282f5af869e0fdd7cc6199fa1aa1f1d591ba9d"
 "checksum proc-macro2 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)" = "cccdc7557a98fe98453030f077df7f3a042052fae465bb61d2c2c41435cfd9b6"
-"checksum quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)" = "e44651a0dc4cdd99f71c83b561e221f714912d11af1a4dff0631f923d53af035"
+"checksum quote 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b71f9f575d55555aa9c06188be9d4e2bfc83ed02537948ac0d520c24d0419f1a"
 "checksum redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)" = "c214e91d3ecf43e9a4e41e578973adeb14b474f2bee858742d127af75a0112b1"
 "checksum redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
 "checksum regex 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "9329abc99e39129fcceabd24cf5d85b4671ef7c29c50e972bc5afe32438ec384"
 "checksum regex-syntax 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)" = "7d707a4fa2637f2dca2ef9fd02225ec7661fe01a53623c1e6515b6916511f7a7"
-"checksum ropey 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b04277dcf17b3ddc4a866111a1017a470359465ebacba6cfc4744026e2c664e1"
+"checksum ropey 0.8.4 (registry+https://github.com/rust-lang/crates.io-index)" = "22ea9149b774f376dc3b7c15e884380a4400cd24476f7d020b6ee6f25dec24dd"
 "checksum serde 1.0.70 (registry+https://github.com/rust-lang/crates.io-index)" = "0c3adf19c07af6d186d91dae8927b83b0553d07ca56cbf7f2f32560455c91920"
 "checksum serde_derive 1.0.70 (registry+https://github.com/rust-lang/crates.io-index)" = "3525a779832b08693031b8ecfb0de81cd71cfd3812088fafe9a7496789572124"
 "checksum smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)" = "26df3bb03ca5eac2e64192b723d51f56c1b1e0860e7c766281f4598f181acdc8"
 "checksum strsim 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b4d15c810519a91cf877e7e36e63fe068815c678181439f2f29e2562147c3694"
-"checksum syn 0.14.4 (registry+https://github.com/rust-lang/crates.io-index)" = "2beff8ebc3658f07512a413866875adddd20f4fd47b2a4e6c9da65cd281baaea"
+"checksum syn 0.14.5 (registry+https://github.com/rust-lang/crates.io-index)" = "4bad7abdf6633f07c7046b90484f1d9dc055eca39f8c991177b1046ce61dba9a"
 "checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
 "checksum thread_local 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "279ef31c19ededf577bfd12dfae728040a21f635b06a24cd670ff510edd38963"
 "checksum ucd-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "fd2be2d6639d0f8fe6cdda291ad456e23629558d466e2789d2c3e9892bda285d"