diff --git a/Cargo.lock b/Cargo.lock
index 53a5e6a..68cca52 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -28,7 +28,7 @@ dependencies = [
 name = "benchmark_repository"
 version = "0.1.0"
 dependencies = [
- "cpython 0.2.0 (git+https://github.com/dgrunwald/rust-cpython/)",
+ "cpython 0.2.1 (git+https://github.com/dgrunwald/rust-cpython/)",
  "git2 0.7.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "indicatif 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -110,12 +110,12 @@ dependencies = [
 
 [[package]]
 name = "cpython"
-version = "0.2.0"
-source = "git+https://github.com/dgrunwald/rust-cpython/#78df48952f279dd5937c9b5b945e1c37d0b107db"
+version = "0.2.1"
+source = "git+https://github.com/dgrunwald/rust-cpython/#0b30b9eb3191c138394d7a4d3a0ffeebeaf67049"
 dependencies = [
  "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "python3-sys 0.2.0 (git+https://github.com/dgrunwald/rust-cpython/)",
+ "python3-sys 0.2.1 (git+https://github.com/dgrunwald/rust-cpython/)",
 ]
 
 [[package]]
@@ -249,8 +249,8 @@ dependencies = [
  "inotify-sys 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio 0.6.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-reactor 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-io 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-reactor 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -525,8 +525,8 @@ dependencies = [
 
 [[package]]
 name = "python3-sys"
-version = "0.2.0"
-source = "git+https://github.com/dgrunwald/rust-cpython/#78df48952f279dd5937c9b5b945e1c37d0b107db"
+version = "0.2.1"
+source = "git+https://github.com/dgrunwald/rust-cpython/#0b30b9eb3191c138394d7a4d3a0ffeebeaf67049"
 dependencies = [
  "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -545,13 +545,21 @@ dependencies = [
  "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rand_core"
-version = "0.2.1"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -716,7 +724,7 @@ dependencies = [
 
 [[package]]
 name = "tokio-executor"
-version = "0.1.4"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "futures 0.1.24 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -724,7 +732,7 @@ dependencies = [
 
 [[package]]
 name = "tokio-io"
-version = "0.1.8"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -734,7 +742,7 @@ dependencies = [
 
 [[package]]
 name = "tokio-reactor"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "crossbeam-utils 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -745,8 +753,8 @@ dependencies = [
  "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-executor 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-io 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -896,7 +904,7 @@ dependencies = [
 "checksum clicolors-control 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1f84dec9bc083ce2503908cd305af98bd363da6f54bf8d4bf0ac14ee749ad5d1"
 "checksum cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
 "checksum console 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "ecd48adf136733979b49e15bc3b4c43cc0d3c85ece7bd08e6daa414c6fcb13e6"
-"checksum cpython 0.2.0 (git+https://github.com/dgrunwald/rust-cpython/)" = "<none>"
+"checksum cpython 0.2.1 (git+https://github.com/dgrunwald/rust-cpython/)" = "<none>"
 "checksum crossbeam-utils 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "677d453a17e8bd2b913fa38e8b9cf04bcdbb5be790aa294f2389661d72036015"
 "checksum curl-sys 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)" = "78800a6de442f65dab6ce26c6f369c14fc585686432bf4b77119d2d384216c31"
 "checksum env_logger 0.5.13 (registry+https://github.com/rust-lang/crates.io-index)" = "15b0a4d2e39f8420210be8b27eeda28029729e2fd4291019455016c348240c38"
@@ -941,10 +949,11 @@ dependencies = [
 "checksum percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "31010dd2e1ac33d5b46a5b413495239882813e0369f8ed8a5e266f173602f831"
 "checksum pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)" = "676e8eb2b1b4c9043511a9b7bea0915320d7e502b0a079fb03f9635a5252b18c"
 "checksum pretty_env_logger 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8ae1b463255bf6613ad435f8997cb57f5d045ef35eb255f5a3d6085be936bd79"
-"checksum python3-sys 0.2.0 (git+https://github.com/dgrunwald/rust-cpython/)" = "<none>"
+"checksum python3-sys 0.2.1 (git+https://github.com/dgrunwald/rust-cpython/)" = "<none>"
 "checksum quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9274b940887ce9addde99c4eee6b5c44cc494b182b97e73dc8ffdcb3397fd3f0"
 "checksum rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)" = "e464cd887e869cddcae8792a4ee31d23c7edd516700695608f5b98c67ee0131c"
-"checksum rand_core 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "edecf0f94da5551fc9b492093e30b041a891657db7940ee221f9d2f66e82eef2"
+"checksum rand_core 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1961a422c4d189dfb50ffa9320bf1f2a9bd54ecb92792fb9477f99a1045f3372"
+"checksum rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0905b6b7079ec73b314d4c748701f6931eb79fd97c668caa3f1899b22b32c6db"
 "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"
@@ -965,9 +974,9 @@ dependencies = [
 "checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
 "checksum termios 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "70226acdf12d182df757d9fb07c0257a1558ec48c8059f607d6b38145ce4e2fa"
 "checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
-"checksum tokio-executor 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "84823b932d566bc3c6aa644df4ca36cb38593c50b7db06011fd4e12e31e4047e"
-"checksum tokio-io 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8d6cc2de7725863c86ac71b0b9068476fec50834f055a243558ef1655bbd34cb"
-"checksum tokio-reactor 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "4bfbaf9f260635649ec26b6fb4aded03887295ffcd999f6e43fd2c4758f758ea"
+"checksum tokio-executor 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "c117b6cf86bb730aab4834f10df96e4dd586eff2c3c27d3781348da49e255bde"
+"checksum tokio-io 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "8b8a85fffbec3c5ab1ab62324570230dcd37ee5996a7859da5caf7b9d45e3e8c"
+"checksum tokio-reactor 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "4b26fd37f1125738b2170c80b551f69ff6fecb277e6e5ca885e53eec2b005018"
 "checksum ucd-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "fd2be2d6639d0f8fe6cdda291ad456e23629558d466e2789d2c3e9892bda285d"
 "checksum unicode-bidi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"
 "checksum unicode-normalization 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "6a0180bc61fc5a987082bfa111f4cc95c4caff7f9799f3e46df09163a937aa25"