diff --git a/Cargo.lock b/Cargo.lock
index 9d34c5d..2d11e0d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5,13 +5,13 @@ dependencies = [
  "ansi_term 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "datetime 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "getopts 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "git2 0.2.5 (git+https://github.com/alexcrichton/git2-rs.git)",
- "locale 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getopts 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "git2 0.2.6 (git+https://github.com/alexcrichton/git2-rs.git)",
+ "locale 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "natord 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "number_prefix 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "pad 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "users 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "users 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -29,20 +29,20 @@ name = "datetime"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "locale 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "locale 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "pad 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex_macros 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex_macros 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "gcc"
-version = "0.3.2"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "getopts"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "log 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -50,13 +50,13 @@ dependencies = [
 
 [[package]]
 name = "git2"
-version = "0.2.5"
-source = "git+https://github.com/alexcrichton/git2-rs.git#bf37458739b5470e9cbee2001f595de302533d51"
+version = "0.2.6"
+source = "git+https://github.com/alexcrichton/git2-rs.git#e79e709310196873a4e6a8e5893295ea9d0fab56"
 dependencies = [
  "bitflags 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libgit2-sys 0.2.5 (git+https://github.com/alexcrichton/git2-rs.git)",
- "url 0.2.27 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libgit2-sys 0.2.7 (git+https://github.com/alexcrichton/git2-rs.git)",
+ "url 0.2.28 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -66,14 +66,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libgit2-sys"
-version = "0.2.5"
-source = "git+https://github.com/alexcrichton/git2-rs.git#bf37458739b5470e9cbee2001f595de302533d51"
+version = "0.2.7"
+source = "git+https://github.com/alexcrichton/git2-rs.git#e79e709310196873a4e6a8e5893295ea9d0fab56"
 dependencies = [
  "libc 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libssh2-sys 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "libz-sys 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "pkg-config 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libssh2-sys 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libz-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -86,26 +86,26 @@ dependencies = [
 
 [[package]]
 name = "libssh2-sys"
-version = "0.1.13"
+version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libz-sys 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "pkg-config 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libz-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "libz-sys"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "pkg-config 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "locale"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -130,13 +130,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "openssl-sys"
-version = "0.5.1"
+version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gcc 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gcc 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "libressl-pnacl-sys 2.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "pkg-config 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -146,7 +146,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "pkg-config"
-version = "0.3.1"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -156,34 +156,34 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "regex"
-version = "0.1.20"
+version = "0.1.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "regex_macros"
-version = "0.1.12"
+version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "regex 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rustc-serialize"
-version = "0.3.6"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "url"
-version = "0.2.27"
+version = "0.2.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "matches 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "users"
-version = "0.2.3"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index 1920e31..17b1bc6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@ locale = "0.1.2"
 natord = "1.0.7"
 number_prefix = "0.2.3"
 pad = "0.1.1"
-users = "0.2.3"
+users = "0.3.1"
 bitflags = "0.1"
 
 [features]