diff --git a/Cargo.lock b/Cargo.lock
index f92bf7f..ceaa98e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -8,7 +8,7 @@ dependencies = [
  "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "git2 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "locale 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "natord 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -41,7 +41,7 @@ name = "cmake"
 version = "0.1.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gcc 0.3.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gcc 0.3.26 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -50,7 +50,7 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "iso8601 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "locale 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "num 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "pad 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -58,7 +58,7 @@ dependencies = [
 
 [[package]]
 name = "gcc"
-version = "0.3.25"
+version = "0.3.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -80,7 +80,7 @@ version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "libgit2-sys 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.38 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -100,7 +100,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libc"
-version = "0.2.8"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -109,11 +109,11 @@ version = "0.3.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cmake 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "gcc 0.3.25 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "libssh2-sys 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
- "libz-sys 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.7.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gcc 0.3.26 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libssh2-sys 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libz-sys 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.7.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -127,23 +127,23 @@ dependencies = [
 
 [[package]]
 name = "libssh2-sys"
-version = "0.1.36"
+version = "0.1.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cmake 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "libz-sys 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.7.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libz-sys 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.7.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "libz-sys"
-version = "1.0.1"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gcc 0.3.25 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gcc 0.3.26 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -152,7 +152,7 @@ name = "locale"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "num 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -185,7 +185,7 @@ name = "num_cpus"
 version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -198,11 +198,11 @@ dependencies = [
 
 [[package]]
 name = "openssl-sys"
-version = "0.7.7"
+version = "0.7.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "gdi32-sys 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "libressl-pnacl-sys 2.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "user32-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -218,15 +218,15 @@ dependencies = [
 
 [[package]]
 name = "phf"
-version = "0.7.13"
+version = "0.7.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "phf_shared 0.7.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "phf_shared 0.7.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "phf_shared"
-version = "0.7.13"
+version = "0.7.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -247,7 +247,7 @@ name = "rand"
 version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -305,7 +305,7 @@ name = "users"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -343,6 +343,6 @@ source = "git+https://github.com/rust-datetime/zoneinfo-data.git#6807bb6be1a444f
 dependencies = [
  "datetime 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "locale 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "phf 0.7.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "phf 0.7.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index acdf4e7..cbb6df0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@ bitflags = "0.1"
 datetime = "0.4.3"
 getopts = "0.2.14"
 lazy_static = "0.1.*"
-libc = "0.2.0"
+libc = "0.2.9"
 locale = "0.2.1"
 natord = "1.0.7"
 num_cpus = "0.2.7"