diff --git a/Cargo.lock b/Cargo.lock
index 5c3e49f..fa56e19 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -27,7 +27,7 @@ dependencies = [
  "actix-utils",
  "derive_more",
  "either",
- "futures 0.3.5",
+ "futures 0.3.16",
  "http 0.2.0",
  "log",
  "trust-dns-proto",
@@ -88,7 +88,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "21705adc76bbe4bc98434890e73a89cd00c6015e5704a60bb6eea6c3b72316b6"
 dependencies = [
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -129,7 +129,7 @@ dependencies = [
  "actix-rt",
  "actix-service",
  "actix-utils",
- "futures 0.3.5",
+ "futures 0.3.16",
  "log",
  "mio",
  "mio-uds",
@@ -158,7 +158,7 @@ dependencies = [
  "actix-rt",
  "actix-server",
  "actix-service",
- "futures 0.3.5",
+ "futures 0.3.16",
  "log",
  "net2",
 ]
@@ -190,7 +190,7 @@ dependencies = [
  "actix-utils",
  "derive_more",
  "either",
- "futures 0.3.5",
+ "futures 0.3.16",
  "log",
 ]
 
@@ -206,7 +206,7 @@ dependencies = [
  "bitflags",
  "bytes 0.5.6",
  "either",
- "futures 0.3.5",
+ "futures 0.3.16",
  "log",
  "pin-project",
  "slab",
@@ -234,7 +234,7 @@ dependencies = [
  "bytes 0.5.6",
  "derive_more",
  "encoding_rs",
- "futures 0.3.5",
+ "futures 0.3.16",
  "fxhash",
  "log",
  "mime",
@@ -256,7 +256,7 @@ checksum = "4f00371942083469785f7e28c540164af1913ee7c96a4534acb9cea92c39f057"
 dependencies = [
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -420,7 +420,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0d0864d84b8e07b145449be9a8537db86bf9de5ce03b913214694643b4743502"
 dependencies = [
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -497,7 +497,7 @@ dependencies = [
  "memchr",
  "num_cpus",
  "once_cell",
- "pin-project-lite",
+ "pin-project-lite 0.1.7",
  "pin-utils",
  "slab",
  "wasm-bindgen-futures",
@@ -515,7 +515,7 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df097e3f506bec0e1a24f06bb3c962c228f36671de841ff579cb99f371772634"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "rustls",
  "webpki",
  "webpki-roots 0.19.0",
@@ -529,7 +529,7 @@ checksum = "750b1c38a1dfadd108da0f01c08f4cdc7ff1bb39b325f9c82cc972361780a6e1"
 dependencies = [
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -559,7 +559,7 @@ dependencies = [
  "exonum-derive",
  "exonum-merkledb",
  "failure",
- "futures 0.3.5",
+ "futures 0.3.16",
  "hex",
  "lazy_static",
  "libp2p",
@@ -1057,7 +1057,7 @@ dependencies = [
  "exonum-derive",
  "exonum-merkledb",
  "failure",
- "futures 0.3.5",
+ "futures 0.3.16",
  "hex",
  "lazy_static",
  "libp2p",
@@ -1110,7 +1110,7 @@ dependencies = [
  "exonum-crypto",
  "exonum-derive",
  "exonum-merkledb",
- "futures 0.3.5",
+ "futures 0.3.16",
  "hex",
  "lazy_static",
  "libp2p",
@@ -1293,7 +1293,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf6b25ee9ac1995c54d7adb2eff8cfffb7260bc774fb63c601ec65467f43cd9d"
 dependencies = [
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -1360,7 +1360,7 @@ dependencies = [
  "proc-macro2",
  "quote 1.0.2",
  "strsim 0.9.3",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -1371,7 +1371,7 @@ checksum = "d9b5a2f4ac4969822c62224815d069952656cadc7084fdca9751e6d959189b72"
 dependencies = [
  "darling_core",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -1394,7 +1394,7 @@ dependencies = [
  "exonum-merkledb",
  "exonum-proto",
  "failure",
- "futures 0.3.5",
+ "futures 0.3.16",
  "hex",
  "lazy_static",
  "log",
@@ -1415,7 +1415,7 @@ checksum = "a806e96c59a76a5ba6e18735b6cf833344671e61e7863f2edb5c518ea2cac95c"
 dependencies = [
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -1457,7 +1457,7 @@ dependencies = [
  "exonum-merkledb",
  "exonum-proto",
  "failure",
- "futures 0.3.5",
+ "futures 0.3.16",
  "hex",
  "log",
  "prost",
@@ -1482,7 +1482,7 @@ dependencies = [
  "exonum-crypto",
  "exonum-derive",
  "exonum-merkledb",
- "futures 0.3.5",
+ "futures 0.3.16",
  "hex",
  "lazy_static",
  "log",
@@ -1546,7 +1546,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -1597,7 +1597,7 @@ dependencies = [
  "proc-macro2",
  "protoc-rust",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
  "walkdir",
 ]
 
@@ -1627,7 +1627,7 @@ dependencies = [
  "proc-macro2",
  "quote 1.0.2",
  "semver",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -1721,7 +1721,7 @@ checksum = "aa4da3c766cd7a0db8242e326e9e4e081edd567072893ed320008189715366a4"
 dependencies = [
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
  "synstructure",
 ]
 
@@ -1819,9 +1819,9 @@ checksum = "1b980f2816d6ee8673b6517b52cb0e808a180efc92e5c19d02cdda79066703ef"
 
 [[package]]
 name = "futures"
-version = "0.3.5"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e05b85ec287aac0dc34db7d4a569323df697f9c55b99b15d6b4ef8cde49f613"
+checksum = "1adc00f486adfc9ce99f77d717836f0c5aa84965eb0b4f051f4e83f7cab53f8b"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -1834,9 +1834,9 @@ dependencies = [
 
 [[package]]
 name = "futures-channel"
-version = "0.3.5"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f366ad74c28cca6ba456d95e6422883cfb4b252a83bed929c83abfdbbf2967d5"
+checksum = "74ed2411805f6e4e3d9bc904c95d5d423b89b3b25dc0250aa74729de20629ff9"
 dependencies = [
  "futures-core",
  "futures-sink",
@@ -1844,9 +1844,9 @@ dependencies = [
 
 [[package]]
 name = "futures-core"
-version = "0.3.5"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59f5fff90fd5d971f936ad674802482ba441b6f09ba5e15fd8b39145582ca399"
+checksum = "af51b1b4a7fdff033703db39de8802c673eb91855f2e0d47dcf3bf2c0ef01f99"
 
 [[package]]
 name = "futures-cpupool"
@@ -1860,9 +1860,9 @@ dependencies = [
 
 [[package]]
 name = "futures-executor"
-version = "0.3.5"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10d6bb888be1153d3abeb9006b11b02cf5e9b209fda28693c31ae1e4e012e314"
+checksum = "4d0d535a57b87e1ae31437b892713aee90cd2d7b0ee48727cd11fc72ef54761c"
 dependencies = [
  "futures-core",
  "futures-task",
@@ -1872,9 +1872,9 @@ dependencies = [
 
 [[package]]
 name = "futures-io"
-version = "0.3.5"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de27142b013a8e869c14957e6d2edeef89e97c289e69d042ee3a49acd8b51789"
+checksum = "0b0e06c393068f3a6ef246c75cdca793d6a46347e75286933e5e75fd2fd11582"
 
 [[package]]
 name = "futures-lite"
@@ -1887,36 +1887,34 @@ dependencies = [
  "futures-io",
  "memchr",
  "parking 2.0.0",
- "pin-project-lite",
+ "pin-project-lite 0.1.7",
  "waker-fn",
 ]
 
 [[package]]
 name = "futures-macro"
-version = "0.3.5"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d0b5a30a4328ab5473878237c447333c093297bded83a4983d10f4deea240d39"
+checksum = "c54913bae956fb8df7f4dc6fc90362aa72e69148e3f39041fbe8742d21e0ac57"
 dependencies = [
+ "autocfg 1.0.0",
  "proc-macro-hack",
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
 name = "futures-sink"
-version = "0.3.5"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f2032893cb734c7a05d85ce0cc8b8c4075278e93b24b66f9de99d6eb0fa8acc"
+checksum = "c0f30aaa67363d119812743aa5f33c201a7a66329f97d1a887022971feea4b53"
 
 [[package]]
 name = "futures-task"
-version = "0.3.5"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bdb66b5f09e22019b1ab0830f7785bcea8e7a42148683f99214f73f8ec21a626"
-dependencies = [
- "once_cell",
-]
+checksum = "bbe54a98670017f3be909561f6ad13e810d9a51f3f061b902062ca3da80799f2"
 
 [[package]]
 name = "futures-timer"
@@ -1926,10 +1924,11 @@ checksum = "e64b03909df88034c26dc1547e8970b91f98bdb65165d6a4e9110d94263dbb2c"
 
 [[package]]
 name = "futures-util"
-version = "0.3.5"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8764574ff08b701a084482c3c7031349104b07ac897393010494beaa18ce32c6"
+checksum = "67eb846bfd58e44a8481a00049e82c43e0ccb5d61f8dc071057cb19249dd4d78"
 dependencies = [
+ "autocfg 1.0.0",
  "futures-channel",
  "futures-core",
  "futures-io",
@@ -1937,7 +1936,7 @@ dependencies = [
  "futures-sink",
  "futures-task",
  "memchr",
- "pin-project",
+ "pin-project-lite 0.2.7",
  "pin-utils",
  "proc-macro-hack",
  "proc-macro-nested",
@@ -1951,7 +1950,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ce54d63f8b0c75023ed920d46fd71d0cbbb830b0ee012726b5b4f506fb6dea5b"
 dependencies = [
  "bytes 0.5.6",
- "futures 0.3.5",
+ "futures 0.3.16",
  "memchr",
  "pin-project",
 ]
@@ -2417,7 +2416,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0306a49ee6a89468f96089906f36b0eef82c988dcfc8acf3e2dcd6ad1c859f85"
 dependencies = [
  "bytes 0.5.6",
- "futures 0.3.5",
+ "futures 0.3.16",
  "lazy_static",
  "libp2p-core",
  "libp2p-core-derive",
@@ -2460,7 +2459,7 @@ dependencies = [
  "ed25519-dalek",
  "either",
  "fnv",
- "futures 0.3.5",
+ "futures 0.3.16",
  "futures-timer",
  "lazy_static",
  "libsecp256k1",
@@ -2490,7 +2489,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f753d9324cd3ec14bf04b8a8cd0d269c87f294153d6bf2a84497a63a5ad22213"
 dependencies = [
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -2500,7 +2499,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "abeff37fa533fead23fc71b14ed0a2aced36c0c65c3d0078aff07821fb71029e"
 dependencies = [
  "flate2",
- "futures 0.3.5",
+ "futures 0.3.16",
  "libp2p-core",
 ]
 
@@ -2510,7 +2509,7 @@ version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f751924b6b98e350005e0b87a822beb246792a3fb878c684e088f866158120ac"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "libp2p-core",
  "log",
 ]
@@ -2523,7 +2522,7 @@ checksum = "02d4f310a02441b681075037ffb41649ee8836619559311b801ef3d5cdbe14cf"
 dependencies = [
  "cuckoofilter",
  "fnv",
- "futures 0.3.5",
+ "futures 0.3.16",
  "libp2p-core",
  "libp2p-swarm",
  "prost",
@@ -2542,7 +2541,7 @@ dependencies = [
  "byteorder 1.3.4",
  "bytes 0.5.6",
  "fnv",
- "futures 0.3.5",
+ "futures 0.3.16",
  "futures_codec",
  "libp2p-core",
  "libp2p-swarm",
@@ -2563,7 +2562,7 @@ version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "912c00a7bf67e0e765daf0cc37e08f675ea26aba3d6d1fbfaee81f19a4c23049"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "libp2p-core",
  "libp2p-swarm",
  "log",
@@ -2583,7 +2582,7 @@ dependencies = [
  "bytes 0.5.6",
  "either",
  "fnv",
- "futures 0.3.5",
+ "futures 0.3.16",
  "futures_codec",
  "libp2p-core",
  "libp2p-swarm",
@@ -2610,7 +2609,7 @@ dependencies = [
  "data-encoding",
  "dns-parser",
  "either",
- "futures 0.3.5",
+ "futures 0.3.16",
  "lazy_static",
  "libp2p-core",
  "libp2p-swarm",
@@ -2630,7 +2629,7 @@ checksum = "14ae0ffacd30f073f96cd518b2c9cd2cb18ac27c3d136a4b23cf1af99f33e541"
 dependencies = [
  "bytes 0.5.6",
  "fnv",
- "futures 0.3.5",
+ "futures 0.3.16",
  "futures_codec",
  "libp2p-core",
  "log",
@@ -2646,7 +2645,7 @@ checksum = "8f353f8966bbaaf7456535fffd3f366f153148773a0cf04b2ec3860955cb720e"
 dependencies = [
  "bytes 0.5.6",
  "curve25519-dalek",
- "futures 0.3.5",
+ "futures 0.3.16",
  "lazy_static",
  "libp2p-core",
  "log",
@@ -2666,7 +2665,7 @@ version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "70130cf130e4ba6dc177366e72dd9f86f9e3588fa1a0c4145247e676f16affad"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "libp2p-core",
  "libp2p-swarm",
  "log",
@@ -2682,7 +2681,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "53f0308a97f6fdd37a2bc388070e471c3ce9d92aa45c99d75c87c2dc5d5cac96"
 dependencies = [
  "bytes 0.5.6",
- "futures 0.3.5",
+ "futures 0.3.16",
  "futures_codec",
  "libp2p-core",
  "log",
@@ -2699,7 +2698,7 @@ version = "0.19.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37d0db10e139d22d7af0b23ed7949449ec86262798aa0fd01595abdbcb02dc87"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "log",
  "pin-project",
  "rand 0.7.3",
@@ -2714,7 +2713,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6f48682b48a96545a323edd150c1d64fc1e250240bba02866e9f902e3dc032a9"
 dependencies = [
  "async-trait",
- "futures 0.3.5",
+ "futures 0.3.16",
  "libp2p-core",
  "libp2p-swarm",
  "smallvec 1.4.2",
@@ -2729,7 +2728,7 @@ checksum = "5ff43513c383f7cdab2736eb98465fc4c5dd5d1988df89749dc8a68950349d56"
 dependencies = [
  "aes-ctr",
  "ctr",
- "futures 0.3.5",
+ "futures 0.3.16",
  "hmac",
  "js-sys",
  "lazy_static",
@@ -2757,7 +2756,7 @@ version = "0.20.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f88d5e2a090a2aadf042cd33484e2f015c6dab212567406a59deece5dedbd133"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "libp2p-core",
  "log",
  "rand 0.7.3",
@@ -2773,7 +2772,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b1fa2bbad054020cb875546a577a66a65a5bf42eff55ed5265f92ffee3cc052"
 dependencies = [
  "async-std",
- "futures 0.3.5",
+ "futures 0.3.16",
  "futures-timer",
  "get_if_addrs",
  "ipnet",
@@ -2789,7 +2788,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9db9fce9e3588c3118475d9ca761c5c133b639a624a7341e2a61e4b28c376b8"
 dependencies = [
  "async-std",
- "futures 0.3.5",
+ "futures 0.3.16",
  "libp2p-core",
  "log",
 ]
@@ -2800,7 +2799,7 @@ version = "0.20.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0feb99e32fea20ffb1bbf56a6fb2614bff7325ff44a515728385170b3420d2c3"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "js-sys",
  "libp2p-core",
  "parity-send-wrapper",
@@ -2816,7 +2815,7 @@ checksum = "046a5201f6e471f22b22b394e4d084269ed1e28cf7300f7b49874385db84c7bd"
 dependencies = [
  "async-tls",
  "either",
- "futures 0.3.5",
+ "futures 0.3.16",
  "libp2p-core",
  "log",
  "quicksink",
@@ -2834,7 +2833,7 @@ version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46ae9bf2f7d8a4be9c7e9b61df9de9dc1bd66419d669098f22f81f8d9571029a"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "libp2p-core",
  "parking_lot 0.10.0",
  "thiserror",
@@ -2992,7 +2991,7 @@ dependencies = [
 name = "message_handler"
 version = "0.1.0"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "lazy_static",
  "libp2p",
  "log",
@@ -3097,7 +3096,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c9157e87afbc2ef0d84cc0345423d715f445edde00141c93721c162de35a05e5"
 dependencies = [
  "bytes 0.5.6",
- "futures 0.3.5",
+ "futures 0.3.16",
  "log",
  "pin-project",
  "smallvec 1.4.2",
@@ -3171,7 +3170,7 @@ dependencies = [
  "exonum-crypto",
  "exonum-derive",
  "exonum-merkledb",
- "futures 0.3.5",
+ "futures 0.3.16",
  "hex",
  "lazy_static",
  "libloading 0.6.2",
@@ -3362,7 +3361,7 @@ dependencies = [
 name = "p2plib"
 version = "0.1.0"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "libp2p",
  "log",
  "message_handler",
@@ -3503,7 +3502,7 @@ checksum = "2c0e815c3ee9a031fdf5af21c10aa17c573c9c6a566328d99e3936c34e36461f"
 dependencies = [
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -3512,6 +3511,12 @@ version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "282adbf10f2698a7a77f8e983a74b2d18176c19a7fd32a45446139ae7b02b715"
 
+[[package]]
+name = "pin-project-lite"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d31d11c69a6b52a174b42bdc0c30e5e11670f90788b2c471c31c1d17d449443"
+
 [[package]]
 name = "pin-utils"
 version = "0.1.0"
@@ -3535,7 +3540,7 @@ dependencies = [
  "exonum-derive",
  "exonum-merkledb",
  "failure",
- "futures 0.3.5",
+ "futures 0.3.16",
  "hex",
  "lazy_static",
  "libp2p",
@@ -3595,14 +3600,9 @@ checksum = "74490b50b9fbe561ac330df47c08f3f33073d2d00c150f719147d7c54522fa1b"
 
 [[package]]
 name = "proc-macro-hack"
-version = "0.5.11"
+version = "0.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ecd45702f76d6d3c75a80564378ae228a85f0b59d2f3ed43c91b4a69eb2ebfc5"
-dependencies = [
- "proc-macro2",
- "quote 1.0.2",
- "syn 1.0.33",
-]
+checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5"
 
 [[package]]
 name = "proc-macro-nested"
@@ -3612,9 +3612,9 @@ checksum = "369a6ed065f249a159e06c45752c780bda2fb53c995718f9e484d08daa9eb42e"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.18"
+version = "1.0.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "beae6331a816b1f65d04c45b078fd8e6c93e8071771f41b8163255bbd8d7c8fa"
+checksum = "5c7ed8b8c7b886ea3ed7dde405212185f423ab44682667c8c6dd14aa1d9f6612"
 dependencies = [
  "unicode-xid 0.2.0",
 ]
@@ -3657,7 +3657,7 @@ dependencies = [
  "itertools",
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -3701,7 +3701,7 @@ dependencies = [
  "protoc-rust",
  "quote 1.0.2",
  "semver",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -3752,7 +3752,7 @@ checksum = "a8461ef7445f61fd72d8dcd0629ce724b9131b3c2eb36e83a5d3d4161c127530"
 dependencies = [
  "futures-core",
  "futures-sink",
- "pin-project-lite",
+ "pin-project-lite 0.1.7",
 ]
 
 [[package]]
@@ -4118,7 +4118,7 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4da5fcb054c46f5a5dff833b129285a93d3f0179531735e6c866e8cc307d2020"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "pin-project",
  "static_assertions",
 ]
@@ -4325,7 +4325,7 @@ checksum = "609feed1d0a73cc36a0182a840a9b37b4a82f0b1150369f0536a9e3f2a31dc48"
 dependencies = [
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -4384,7 +4384,7 @@ dependencies = [
  "exonum-crypto",
  "exonum-derive",
  "exonum-merkledb",
- "futures 0.3.5",
+ "futures 0.3.16",
  "lazy_static",
  "log",
  "message_handler",
@@ -4531,7 +4531,7 @@ dependencies = [
  "base64 0.12.3",
  "bytes 0.5.6",
  "flate2",
- "futures 0.3.5",
+ "futures 0.3.16",
  "httparse",
  "log",
  "rand 0.7.3",
@@ -4614,9 +4614,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.33"
+version = "1.0.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e8d5d96e8cbb005d6959f119f773bfaebb5684296108fb32600c00cde305b2cd"
+checksum = "1873d832550d4588c3dbc20f01361ab00bfe741048f71e3fecf145a7cc18b29c"
 dependencies = [
  "proc-macro2",
  "quote 1.0.2",
@@ -4640,7 +4640,7 @@ checksum = "67656ea1dc1b41b1451851562ea232ec2e5a80242139f7e679ceccfb5d61f545"
 dependencies = [
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
  "unicode-xid 0.2.0",
 ]
 
@@ -4705,7 +4705,7 @@ checksum = "a7b51e1fbc44b5a0840be594fbc0f960be09050f2617e61e6aa43bef97cd3ef4"
 dependencies = [
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
 ]
 
 [[package]]
@@ -4782,7 +4782,7 @@ dependencies = [
  "memchr",
  "mio",
  "mio-uds",
- "pin-project-lite",
+ "pin-project-lite 0.1.7",
  "signal-hook-registry",
  "slab",
  "winapi 0.3.9",
@@ -4912,7 +4912,7 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "log",
- "pin-project-lite",
+ "pin-project-lite 0.1.7",
  "tokio 0.2.13",
 ]
 
@@ -4940,7 +4940,7 @@ dependencies = [
  "async-trait",
  "enum-as-inner",
  "failure",
- "futures 0.3.5",
+ "futures 0.3.16",
  "idna 0.2.0",
  "lazy_static",
  "log",
@@ -4959,7 +4959,7 @@ checksum = "6f90b1502b226f8b2514c6d5b37bafa8c200d7ca4102d57dc36ee0f3b7a04a2f"
 dependencies = [
  "cfg-if 0.1.10",
  "failure",
- "futures 0.3.5",
+ "futures 0.3.16",
  "ipconfig",
  "lazy_static",
  "log",
@@ -5234,7 +5234,7 @@ dependencies = [
  "exonum-derive",
  "exonum-merkledb",
  "failure",
- "futures 0.3.5",
+ "futures 0.3.16",
  "hex",
  "log",
  "prost",
@@ -5259,7 +5259,7 @@ dependencies = [
  "exonum-crypto",
  "exonum-derive",
  "exonum-merkledb",
- "futures 0.3.5",
+ "futures 0.3.16",
  "hex",
  "lazy_static",
  "log",
@@ -5308,7 +5308,7 @@ dependencies = [
  "log",
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
  "wasm-bindgen-shared",
 ]
 
@@ -5342,7 +5342,7 @@ checksum = "3156052d8ec77142051a533cdd686cba889537b213f948cd1d20869926e68e92"
 dependencies = [
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -5359,7 +5359,7 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "324c5e65a08699c9c4334ba136597ab22b85dccd4b65dd1e36ccf8f723a95b54"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "js-sys",
  "parking_lot 0.9.0",
  "pin-utils",
@@ -5528,7 +5528,7 @@ version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cd37e58a1256a0b328ce9c67d8b62ecdd02f4803ba443df478835cb1a41a637c"
 dependencies = [
- "futures 0.3.5",
+ "futures 0.3.16",
  "log",
  "nohash-hasher",
  "parking_lot 0.10.0",
@@ -5553,7 +5553,7 @@ checksum = "de251eec69fc7c1bc3923403d18ececb929380e016afe103da75f396704f8ca2"
 dependencies = [
  "proc-macro2",
  "quote 1.0.2",
- "syn 1.0.33",
+ "syn 1.0.74",
  "synstructure",
 ]
 
diff --git a/src/node/Cargo.toml b/src/node/Cargo.toml
index 1c721cd..f31cef2 100644
--- a/src/node/Cargo.toml
+++ b/src/node/Cargo.toml
@@ -27,7 +27,7 @@ hex = "^0.4"
 serde = { version = "1.0", features = ["derive"] }
 serde_cbor = "^0.11"
 libp2p = "0.22.0"
-futures = "0.3.5"
+futures = "0.3.16"
 async-std = "^1.6"
 env_logger = "0.7.1"
 lazy_static = "^1.4"
diff --git a/src/user/doc_app_client/Cargo.toml b/src/user/doc_app_client/Cargo.toml
index d80e3c2..c4505c5 100644
--- a/src/user/doc_app_client/Cargo.toml
+++ b/src/user/doc_app_client/Cargo.toml
@@ -20,7 +20,7 @@ bytes = "0.5.6"
 actix-web = "2.0.0"
 actix-rt = "1.1.1"
 awc = "1.0.1"
-futures = "0.3.5"
+futures = "0.3.16"
 hex = "0.4.2"
 toml = "0.5.5"
 serde = { version = "1.0", features = ["derive"] }
diff --git a/src/user/wallet_app_client/Cargo.toml b/src/user/wallet_app_client/Cargo.toml
index 8a157ee..5068c34 100644
--- a/src/user/wallet_app_client/Cargo.toml
+++ b/src/user/wallet_app_client/Cargo.toml
@@ -20,7 +20,7 @@ bytes = "0.5.6"
 actix-web = "2.0.0"
 actix-rt = "1.1.1"
 awc = "1.0.1"
-futures = "0.3.5"
+futures = "0.3.16"
 hex = "0.4.2"
 toml = "0.5.5"
 serde = { version = "1.0", features = ["derive"] }