diff --git a/Cargo.lock b/Cargo.lock
index f6e98d4..db28a8b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6,7 +6,7 @@ dependencies = [
  "bitflags 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "datetime 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "git2 0.3.0 (git+https://github.com/alexcrichton/git2-rs.git)",
+ "git2 0.3.1 (git+https://github.com/alexcrichton/git2-rs.git)",
  "libc 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "locale 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "natord 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -23,7 +23,7 @@ name = "advapi32-sys"
 version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "winapi 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -77,7 +77,7 @@ version = "0.3.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "advapi32-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -87,12 +87,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "git2"
-version = "0.3.0"
-source = "git+https://github.com/alexcrichton/git2-rs.git#cbe8e1a65ac9b16bc05137f80673e74c4d36f6e5"
+version = "0.3.1"
+source = "git+https://github.com/alexcrichton/git2-rs.git#16d32f2468b9ff01e034d9e81578528c1a29c97e"
 dependencies = [
  "bitflags 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libgit2-sys 0.3.2 (git+https://github.com/alexcrichton/git2-rs.git)",
+ "libgit2-sys 0.3.4 (git+https://github.com/alexcrichton/git2-rs.git)",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -103,8 +103,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libgit2-sys"
-version = "0.3.2"
-source = "git+https://github.com/alexcrichton/git2-rs.git#cbe8e1a65ac9b16bc05137f80673e74c4d36f6e5"
+version = "0.3.4"
+source = "git+https://github.com/alexcrichton/git2-rs.git#16d32f2468b9ff01e034d9e81578528c1a29c97e"
 dependencies = [
  "cmake 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -235,7 +235,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "advapi32-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -245,12 +245,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "aho-corasick 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex-syntax 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "regex-syntax"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -335,7 +335,7 @@ dependencies = [
 
 [[package]]
 name = "winapi"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]