diff --git a/Cargo.lock b/Cargo.lock
index 03ea58f..53dae0e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -485,7 +485,7 @@ dependencies = [
 
 [[package]]
 name = "fixedbitset"
-version = "0.1.9"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -937,7 +937,7 @@ dependencies = [
 
 [[package]]
 name = "multimap"
-version = "0.4.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1081,10 +1081,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "petgraph"
-version = "0.4.13"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "fixedbitset 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fixedbitset 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "indexmap 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1143,50 +1144,49 @@ dependencies = [
 
 [[package]]
 name = "prost"
-version = "0.5.0"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "prost-derive 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "prost-derive 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "prost-build"
-version = "0.5.0"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "multimap 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "petgraph 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "prost 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "prost-types 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "multimap 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "petgraph 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "prost 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "prost-types 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "which 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "which 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "prost-derive"
-version = "0.5.0"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "anyhow 1.0.26 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "prost-types"
-version = "0.5.0"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "prost 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "prost 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1791,16 +1791,6 @@ dependencies = [
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "syn"
-version = "0.15.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "syn"
 version = "1.0.11"
@@ -1969,7 +1959,7 @@ dependencies = [
 
 [[package]]
 name = "tonic"
-version = "0.1.0-beta.1"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "async-stream 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1983,8 +1973,8 @@ dependencies = [
  "hyper 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "pin-project 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "prost 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "prost-derive 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "prost 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "prost-derive 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustls-native-certs 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-rustls 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2000,11 +1990,11 @@ dependencies = [
 
 [[package]]
 name = "tonic-build"
-version = "0.1.0-beta.1"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "prost-build 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "prost-build 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -2417,10 +2407,9 @@ dependencies = [
 
 [[package]]
 name = "which"
-version = "2.0.1"
+version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -2572,8 +2561,8 @@ dependencies = [
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  "log4rs 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "pairing 0.14.2 (git+https://github.com/adityapk00/librustzcash.git?rev=188537ea025fcb7fbdfc11266f307a084a5451e4)",
- "prost 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "prost-types 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "prost 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "prost-types 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "protobuf 2.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ring 0.16.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2586,8 +2575,8 @@ dependencies = [
  "tiny-bip39 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-rustls 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "tonic 0.1.0-beta.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "tonic-build 0.1.0-beta.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tonic 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tonic-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "webpki 0.21.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "webpki-roots 0.18.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "zcash_client_backend 0.0.0 (git+https://github.com/adityapk00/librustzcash.git?rev=188537ea025fcb7fbdfc11266f307a084a5451e4)",
@@ -2658,7 +2647,7 @@ dependencies = [
 "checksum ff 0.4.0 (git+https://github.com/adityapk00/librustzcash.git?rev=188537ea025fcb7fbdfc11266f307a084a5451e4)" = "<none>"
 "checksum ff_derive 0.3.0 (git+https://github.com/adityapk00/librustzcash.git?rev=188537ea025fcb7fbdfc11266f307a084a5451e4)" = "<none>"
 "checksum filetime 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "1ff6d4dab0aa0c8e6346d46052e93b13a16cf847b54ed357087c35011048cc7d"
-"checksum fixedbitset 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "86d4de0081402f5e88cdac65c8dcdcc73118c1a7a465e2a05f0da05843a8ea33"
+"checksum fixedbitset 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "37ab347416e802de484e4d03c7316c48f1ecb56574dfd4a46a80f173ce1de04d"
 "checksum flate2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)" = "6bd6d6f4752952feb71363cffc9ebac9411b75b87c6ab6058c40c8900cf43c0f"
 "checksum fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "2fad85553e09a6f881f739c29f0b00b0f01357c743266d478b68951ce23285f3"
 "checksum fpe 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "21988a326139165b75e3196bc6962ca638e5fb0c95102fbf152a3743174b01e4"
@@ -2710,7 +2699,7 @@ dependencies = [
 "checksum mio-uds 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)" = "966257a94e196b11bb43aca423754d87429960a768de9414f3691d6957abf125"
 "checksum miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f2f3b1cf331de6896aabf6e9d55dca90356cc9960cca7eaaf408a355ae919"
 "checksum miow 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "396aa0f2003d7df8395cb93e09871561ccc3e785f0acb369170e8cc74ddf9226"
-"checksum multimap 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2eb04b9f127583ed176e163fb9ec6f3e793b87e21deedd5734a69386a18a0151"
+"checksum multimap 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a97fbd5d00e0e37bfb10f433af8f5aaf631e739368dc9fc28286ca81ca4948dc"
 "checksum net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)" = "42550d9fb7b6684a6d404d9fa7250c2eb2646df731d1c06afc06dcee9e1bcf88"
 "checksum nix 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)" = "6c722bee1037d430d0f8e687bbdbf222f27cc6e4e68d5caf630857bb2b6dbdce"
 "checksum nom 4.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2ad2a91a8e869eeb30b9cb3119ae87773a8f4ae617f41b1eb9c154b2905f7bd6"
@@ -2727,7 +2716,7 @@ dependencies = [
 "checksum parking_lot_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "94c8c7923936b28d546dfd14d4472eaf34c99b14e1c973a32b3e6d4eb04298c9"
 "checksum pbkdf2 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "006c038a43a45995a9670da19e67600114740e8511d4333bf97a56e66a7542d9"
 "checksum percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "31010dd2e1ac33d5b46a5b413495239882813e0369f8ed8a5e266f173602f831"
-"checksum petgraph 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)" = "9c3659d1ee90221741f65dd128d9998311b0e40c5d3c23a62445938214abce4f"
+"checksum petgraph 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "29c127eea4a29ec6c85d153c59dc1213f33ec74cead30fe4730aecc88cc1fd92"
 "checksum pin-project 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "94b90146c7216e4cb534069fb91366de4ea0ea353105ee45ed297e2d1619e469"
 "checksum pin-project-internal 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "44ca92f893f0656d3cba8158dd0f2b99b94de256a4a54e870bd6922fcc6c8355"
 "checksum pin-project-lite 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f0af6cbca0e6e3ce8692ee19fb8d734b641899e07b68eb73e9bbbd32f1703991"
@@ -2736,10 +2725,10 @@ dependencies = [
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 "checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
 "checksum proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "9c9e470a8dc4aeae2dee2f335e8f533e2d4b347e1434e5671afc49b054592f27"
-"checksum prost 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "96d14b1c185652833d24aaad41c5832b0be5616a590227c1fbff57c616754b23"
-"checksum prost-build 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "eb788126ea840817128183f8f603dce02cb7aea25c2a0b764359d8e20010702e"
-"checksum prost-derive 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5e7dc378b94ac374644181a2247cebf59a6ec1c88b49ac77f3a94b86b79d0e11"
-"checksum prost-types 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1de482a366941c8d56d19b650fac09ca08508f2a696119ee7513ad590c8bac6f"
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+"checksum prost-derive 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "537aa19b95acde10a12fec4301466386f757403de4cd4e5b4fa78fb5ecb18f72"
+"checksum prost-types 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1834f67c0697c001304b75be76f67add9c89742eda3a085ad8ee0bb38c3417aa"
 "checksum protobuf 2.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "40361836defdd5871ff7e84096c6f6444af7fc157f8ef1789f54f147687caa20"
 "checksum protobuf-codegen 2.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "12c6abd78435445fc86898ebbd0521a68438063d4a73e23527b7134e6bf58b4a"
 "checksum protobuf-codegen-pure 2.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c1646acda5319f5b28b0bff4a484324df43ddae2c0f5a3f3e63c0b26095cd600"
@@ -2810,7 +2799,6 @@ dependencies = [
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 "checksum subtle 2.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7c65d530b10ccaeac294f349038a597e435b18fb456aadd0840a623f83b9e941"
 "checksum syn 0.14.9 (registry+https://github.com/rust-lang/crates.io-index)" = "261ae9ecaa397c42b960649561949d69311f08eeaea86a65696e6e46517cf741"
-"checksum syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)" = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
 "checksum syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)" = "dff0acdb207ae2fe6d5976617f887eb1e35a2ba52c13c7234c790960cdad9238"
 "checksum synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)" = "67656ea1dc1b41b1451851562ea232ec2e5a80242139f7e679ceccfb5d61f545"
 "checksum take_mut 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f764005d11ee5f36500a149ace24e00e3da98b0158b3e2d53a7495660d3f4d60"
@@ -2826,8 +2814,8 @@ dependencies = [
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 "checksum tokio-rustls 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ea2ce8e6bc7ce619b4fc05761a550c8a750f6bf551f2e9b1efaec93124e13d51"
 "checksum tokio-util 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "571da51182ec208780505a32528fc5512a8fe1443ab960b3f2f3ef093cd16930"
-"checksum tonic 0.1.0-beta.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3e856eb0eaaf2d71ccde5de981ab09aced2ca4acf397fe33c0a8df67326cb968"
-"checksum tonic-build 0.1.0-beta.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3fd6e2f53c54cd28efefa13cd081160a85eb913d280beee99b1bd3f9ca219048"
+"checksum tonic 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "08283643b1d483eb7f3fc77069e63b5cba3e4db93514b3d45470e67f123e4e48"
+"checksum tonic-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0436413ba71545bcc6c2b9a0f9d78d72deb0123c6a75ccdfe7c056f9930f5e52"
 "checksum tower 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4b299df54795e6f72bca45063b5803d1f9a1ba9b11a3c7c64d0b84519b451fdd"
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@@ -2874,7 +2862,7 @@ dependencies = [
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 "checksum webpki-roots 0.18.0 (registry+https://github.com/rust-lang/crates.io-index)" = "91cd5736df7f12a964a5067a12c62fa38e1bd8080aff1f80bc29be7c80d19ab4"
 "checksum weedle 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3bb43f70885151e629e2a19ce9e50bd730fd436cfd4b666894c9ce4de9141164"
-"checksum which 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b57acb10231b9493c8472b20cb57317d0679a49e0bdbee44b3b803a6473af164"
+"checksum which 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5475d47078209a02e60614f7ba5e645ef3ed60f771920ac1906d7c1cc65024c8"
 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
diff --git a/lib/Cargo.toml b/lib/Cargo.toml
index dc2e2f7..ab6a146 100644
--- a/lib/Cargo.toml
+++ b/lib/Cargo.toml
@@ -23,10 +23,10 @@ rand = "0.7.2"
 sodiumoxide = "0.2.5"
 ring = "0.16.9"
 
-tonic = { version = "0.1.0-beta.1", features = ["tls", "tls-roots"] }
+tonic = { version = "0.1.1", features = ["tls", "tls-roots"] }
 bytes = "0.4"
-prost = "0.5"
-prost-types = "0.5"
+prost = "0.6"
+prost-types = "0.6"
 tokio = { version = "0.2", features = ["rt-threaded", "time", "stream", "fs", "macros", "uds", "full"] }
 tokio-rustls = { version = "0.12.1", features = ["dangerous_configuration"] }
 webpki = "0.21.0"
@@ -64,7 +64,7 @@ rev = "188537ea025fcb7fbdfc11266f307a084a5451e4"
 features = ["ff_derive"]
 
 [build-dependencies]
-tonic-build = "0.1.0-beta.1"
+tonic-build = "0.1.1"
 
 [dev-dependencies]
 tempdir = "0.3.7"