diff --git a/Cargo.lock b/Cargo.lock
index ae8f8587d4..edbc61f32c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -570,10 +570,10 @@ dependencies = [
  "futures",
  "http-body",
  "pin-project",
- "prost",
+ "prost 0.9.0",
  "rand_core 0.6.3",
  "thiserror",
- "tonic",
+ "tonic 0.6.1",
  "tonic-build",
 ]
 
@@ -612,7 +612,7 @@ name = "chain-vote"
 version = "0.1.0"
 source = "git+https://github.com/input-output-hk/chain-libs.git?branch=master#95d1883f318538f924f65f1a3a282ec5b9ed446f"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
  "chain-core",
  "chain-crypto",
  "const_format",
@@ -763,7 +763,7 @@ dependencies = [
  "clap",
  "criterion-plot",
  "csv",
- "itertools",
+ "itertools 0.10.1",
  "lazy_static",
  "num-traits",
  "oorandom",
@@ -785,7 +785,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d00996de9f2f7559f7f4dc286073197f83e92256a59ed395f9aac01fe717da57"
 dependencies = [
  "cast",
- "itertools",
+ "itertools 0.10.1",
 ]
 
 [[package]]
@@ -1151,6 +1151,51 @@ dependencies = [
  "regex",
 ]
 
+[[package]]
+name = "explorer"
+version = "0.9.1"
+dependencies = [
+ "anyhow",
+ "async-graphql",
+ "async-graphql-warp",
+ "base64",
+ "cardano-legacy-address",
+ "chain-addr",
+ "chain-core",
+ "chain-crypto",
+ "chain-impl-mockchain",
+ "chain-network",
+ "chain-ser",
+ "chain-time",
+ "chain-vote",
+ "futures",
+ "futures-channel",
+ "futures-util",
+ "imhamt",
+ "jormungandr-lib",
+ "lazy_static",
+ "parity-multiaddr",
+ "rand 0.8.4",
+ "rand_chacha 0.3.1",
+ "serde",
+ "serde_json",
+ "serde_yaml",
+ "structopt",
+ "thiserror",
+ "tokio",
+ "tokio-stream",
+ "tokio-util",
+ "tonic 0.4.3",
+ "tracing",
+ "tracing-appender",
+ "tracing-futures",
+ "tracing-gelf",
+ "tracing-journald",
+ "tracing-subscriber",
+ "url",
+ "warp",
+]
+
 [[package]]
 name = "failure"
 version = "0.1.8"
@@ -1528,7 +1573,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8bc64bdceb2909623131a62d470e809c32f86b8329d82f8d31d9971349cb00a"
 dependencies = [
  "gtmpl_value",
- "itertools",
+ "itertools 0.10.1",
  "lazy_static",
  "percent-encoding",
 ]
@@ -1857,6 +1902,15 @@ version = "2.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68f2d64f2edebec4ce84ad108148e67e1064789bee435edc5b60ad398714a3a9"
 
+[[package]]
+name = "itertools"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "284f18f85651fe11e8a991b2adb42cb078325c996ed026d994719efcfca1d54b"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itertools"
 version = "0.10.1"
@@ -1912,8 +1966,6 @@ name = "jormungandr"
 version = "0.13.0"
 dependencies = [
  "arc-swap",
- "async-graphql",
- "async-graphql-warp",
  "async-trait",
  "base64",
  "bech32 0.8.1",
@@ -1957,7 +2009,7 @@ dependencies = [
  "tokio",
  "tokio-stream",
  "tokio-util",
- "tonic",
+ "tonic 0.6.1",
  "tracing",
  "tracing-appender",
  "tracing-futures",
@@ -1994,7 +2046,7 @@ dependencies = [
  "parity-multiaddr",
  "poldercast",
  "predicates 2.0.2",
- "prost",
+ "prost 0.9.0",
  "rand 0.8.4",
  "rand_chacha 0.3.1",
  "rand_core 0.6.3",
@@ -2008,7 +2060,7 @@ dependencies = [
  "tempfile",
  "thiserror",
  "tokio",
- "tonic",
+ "tonic 0.6.1",
  "tracing",
  "url",
  "yaml-rust",
@@ -2127,7 +2179,7 @@ dependencies = [
  "parity-multiaddr",
  "poldercast",
  "predicates 2.0.2",
- "prost",
+ "prost 0.9.0",
  "qrcodegen",
  "quircs",
  "rand 0.8.4",
@@ -2148,7 +2200,7 @@ dependencies = [
  "thiserror",
  "tokio",
  "tokio-stream",
- "tonic",
+ "tonic 0.6.1",
  "tonic-build",
  "tracing",
  "tracing-subscriber",
@@ -2880,7 +2932,7 @@ checksum = "c143348f141cc87aab5b950021bac6145d0e5ae754b0591de23244cee42c9308"
 dependencies = [
  "difflib",
  "float-cmp 0.9.0",
- "itertools",
+ "itertools 0.10.1",
  "normalize-line-endings",
  "predicates-core",
  "regex",
@@ -3010,6 +3062,16 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "prost"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e6984d2f1a23009bd270b8bb56d0926810a3d483f59c987d77969e9d8e840b2"
+dependencies = [
+ "bytes",
+ "prost-derive 0.7.0",
+]
+
 [[package]]
 name = "prost"
 version = "0.9.0"
@@ -3017,7 +3079,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "444879275cb4fd84958b1a1d5420d15e6fcf7c235fe47f053c9c2a80aceb6001"
 dependencies = [
  "bytes",
- "prost-derive",
+ "prost-derive 0.9.0",
 ]
 
 [[package]]
@@ -3028,18 +3090,31 @@ checksum = "62941722fb675d463659e49c4f3fe1fe792ff24fe5bbaa9c08cd3b98a1c354f5"
 dependencies = [
  "bytes",
  "heck",
- "itertools",
+ "itertools 0.10.1",
  "lazy_static",
  "log",
  "multimap",
  "petgraph",
- "prost",
+ "prost 0.9.0",
  "prost-types",
  "regex",
  "tempfile",
  "which",
 ]
 
+[[package]]
+name = "prost-derive"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "169a15f3008ecb5160cba7d37bcd690a7601b6d30cfb87a117d45e59d52af5d4"
+dependencies = [
+ "anyhow",
+ "itertools 0.9.0",
+ "proc-macro2 1.0.28",
+ "quote 1.0.9",
+ "syn 1.0.74",
+]
+
 [[package]]
 name = "prost-derive"
 version = "0.9.0"
@@ -3047,7 +3122,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f9cc1a3263e07e0bf68e96268f37665207b49560d98739662cdfaae215c720fe"
 dependencies = [
  "anyhow",
- "itertools",
+ "itertools 0.10.1",
  "proc-macro2 1.0.28",
  "quote 1.0.9",
  "syn 1.0.74",
@@ -3060,7 +3135,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "534b7a0e836e3c482d2693070f982e39e7611da9695d4d1f5a4b186b51faef0a"
 dependencies = [
  "bytes",
- "prost",
+ "prost 0.9.0",
 ]
 
 [[package]]
@@ -4158,6 +4233,35 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "tonic"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ac42cd97ac6bd2339af5bcabf105540e21e45636ec6fa6aae5e85d44db31be0"
+dependencies = [
+ "async-stream",
+ "async-trait",
+ "base64",
+ "bytes",
+ "futures-core",
+ "futures-util",
+ "h2",
+ "http",
+ "http-body",
+ "hyper",
+ "percent-encoding",
+ "pin-project",
+ "prost 0.7.0",
+ "prost-derive 0.7.0",
+ "tokio",
+ "tokio-stream",
+ "tokio-util",
+ "tower",
+ "tower-service",
+ "tracing",
+ "tracing-futures",
+]
+
 [[package]]
 name = "tonic"
 version = "0.6.1"
@@ -4177,8 +4281,8 @@ dependencies = [
  "hyper-timeout",
  "percent-encoding",
  "pin-project",
- "prost",
- "prost-derive",
+ "prost 0.9.0",
+ "prost-derive 0.9.0",
  "tokio",
  "tokio-stream",
  "tokio-util",