diff --git a/Cargo.lock b/Cargo.lock
index 2968662..68f5d78 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -12,12 +12,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bit-vec 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures-cpupool 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "pairing 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pairing 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -28,7 +28,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "bitflags"
-version = "1.0.1"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -37,7 +37,7 @@ version = "0.2.18"
 source = "git+https://github.com/gtank/blake2-rfc?rev=7a5b5fc99ae483a0043db7547fb79a6fa44b88a9#7a5b5fc99ae483a0043db7547fb79a6fa44b88a9"
 dependencies = [
  "arrayvec 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "constant_time_eq 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -52,7 +52,7 @@ dependencies = [
 
 [[package]]
 name = "byteorder"
-version = "1.2.2"
+version = "1.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -78,7 +78,7 @@ name = "fuchsia-zircon"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -129,24 +129,24 @@ dependencies = [
 
 [[package]]
 name = "pairing"
-version = "0.14.1"
+version = "0.14.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "phase2"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bellman 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "blake2-rfc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "pairing 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pairing 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -163,25 +163,25 @@ dependencies = [
 [[package]]
 name = "sapling-crypto"
 version = "0.0.1"
-source = "git+https://github.com/zcash-hackworks/sapling-crypto?rev=e554b473dd10885d232f42237c13282f5b6fee43#e554b473dd10885d232f42237c13282f5b6fee43"
+source = "git+https://github.com/zcash-hackworks/sapling-crypto?rev=eb409fa3cf8df215ae8d35f5e385751a0c5ffb85#eb409fa3cf8df215ae8d35f5e385751a0c5ffb85"
 dependencies = [
  "bellman 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "blake2-rfc 0.2.18 (git+https://github.com/gtank/blake2-rfc?rev=7a5b5fc99ae483a0043db7547fb79a6fa44b88a9)",
- "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "digest 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "pairing 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pairing 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "sapling-mpc"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "blake2-rfc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "pairing 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "phase2 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pairing 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "phase2 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "sapling-crypto 0.0.1 (git+https://github.com/zcash-hackworks/sapling-crypto?rev=e554b473dd10885d232f42237c13282f5b6fee43)",
+ "sapling-crypto 0.0.1 (git+https://github.com/zcash-hackworks/sapling-crypto?rev=eb409fa3cf8df215ae8d35f5e385751a0c5ffb85)",
 ]
 
 [[package]]
@@ -212,10 +212,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum arrayvec 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)" = "a1e964f9e24d588183fcb43503abda40d288c8657dfc27311516ce2f05675aef"
 "checksum bellman 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "eae372472c7ea8f7c8fc6a62f7d5535db8302de7f1aafda2e13a97c4830d3bcf"
 "checksum bit-vec 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "02b4ff8b16e6076c3e14220b39fbc1fabb6737522281a388998046859400895f"
-"checksum bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b3c30d3802dfb7281680d6285f2ccdaa8c2d8fee41f93805dba5c4cf50dc23cf"
+"checksum bitflags 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d0c54bb8f454c567f21197eefcdbf5679d0bd99f2ddbe52e84c77061952e6789"
 "checksum blake2-rfc 0.2.18 (git+https://github.com/gtank/blake2-rfc?rev=7a5b5fc99ae483a0043db7547fb79a6fa44b88a9)" = "<none>"
 "checksum blake2-rfc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)" = "5d6d530bdd2d52966a6d03b7a964add7ae1a288d25214066fd4b600f0f796400"
-"checksum byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "73b5bdfe7ee3ad0b99c9801d58807a9dbc9e09196365b0203853b99889ab3c87"
+"checksum byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "74c0b906e9446b0a2e4f760cdb3fa4b2c48cdc6db8766a845c54b6ff063fd2e9"
 "checksum constant_time_eq 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8ff012e225ce166d4422e0e78419d901719760f62ae2b7969ca6b564d1b54a9e"
 "checksum crossbeam 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "24ce9782d4d5c53674646a6a4c1863a21a8fc0cb649b3c94dfc16e45071dea19"
 "checksum digest 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "00a49051fef47a72c9623101b19bd71924a45cca838826caae3eaa4d00772603"
@@ -227,10 +227,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)" = "6fd41f331ac7c5b8ac259b8bf82c75c0fb2e469bbf37d2becbba9a6a2221965b"
 "checksum nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "9a2228dca57108069a5262f2ed8bd2e82496d2e074a06d1ccc7ce1687b6ae0a2"
 "checksum num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c51a3322e4bca9d212ad9a158a02abc6934d005490c054a2778df73a70aa0a30"
-"checksum pairing 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)" = "06f21a403a78257de696b59a5bfafad56a3b3ab8f27741c8122750bf0ebbb9fa"
-"checksum phase2 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "6cf5a7c71a1843d32da099c51cd0f19924cea670f38d5610150be7df23aedd83"
+"checksum pairing 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)" = "ceda21136251c6d5a422d3d798d8ac22515a6e8d3521bb60c59a8349d36d0d57"
+"checksum phase2 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "606ceb505d6e61f0dfbbc1cd1df498c3e58ad17001f06cb874c3324dd5700e77"
 "checksum rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "eba5f8cb59cc50ed56be8880a5c7b496bfd9bd26394e176bc67884094145c2c5"
-"checksum sapling-crypto 0.0.1 (git+https://github.com/zcash-hackworks/sapling-crypto?rev=e554b473dd10885d232f42237c13282f5b6fee43)" = "<none>"
+"checksum sapling-crypto 0.0.1 (git+https://github.com/zcash-hackworks/sapling-crypto?rev=eb409fa3cf8df215ae8d35f5e385751a0c5ffb85)" = "<none>"
 "checksum typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "612d636f949607bdf9b123b4a6f6d966dedf3ff669f7f045890d3a4a73948169"
 "checksum winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "04e3bd221fcbe8a271359c04f21a76db7d0c6028862d1bb5512d85e1e2eb5bb3"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
diff --git a/Cargo.toml b/Cargo.toml
index e942d26..d8a194f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "sapling-mpc"
-version = "0.1.0"
+version = "0.2.0"
 authors = ["Sean Bowe <ewillbefull@gmail.com>"]
 
 [[bin]]
@@ -28,9 +28,10 @@ blake2-rfc = "0.2"
 
 [dependencies.sapling-crypto]
 git = "https://github.com/zcash-hackworks/sapling-crypto"
-rev = "e554b473dd10885d232f42237c13282f5b6fee43"
+rev = "eb409fa3cf8df215ae8d35f5e385751a0c5ffb85"
 optional = true
 
 [features]
 verification = ["sapling-crypto"]
 u128-support = ["pairing/u128-support"]
+default = ["u128-support"]
diff --git a/README.md b/README.md
index 7bdcd28..33dc133 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,20 @@
 # sapling-mpc
 
-This library is still under development.
+This code can be used to participate and verify the Sapling network upgrade MPC.
+
+## What do I do?
+
+Contact **mpc@z.cash** to schedule a time to participate. You'll need the latest (stable) [Rust compiler](https://www.rust-lang.org/) to participate using this code.
+
+When it's your turn, you'll receive a `params` file from us. Place this file in the current directory and run:
+
+```
+cargo run --release --bin compute
+```
+
+This will compute for a little while, and then spit out a `new_params` file. That's what you'll upload back to us.
+
+The tool also prints a hash. This hash is what you and others can use to verify that your contribution actually ended up in the final parameters, so you're encouraged to save it to check later!
 
 ## License