diff --git a/Cargo.lock b/Cargo.lock
index e6f8d96f3..602bb3eab 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -108,18 +108,6 @@ dependencies = [
  "cipher",
 ]
 
-[[package]]
-name = "aes-ctr"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64c3b03608ea1c077228520a167cca2514dc7cd8100a81b30a2b38be985234e5"
-dependencies = [
- "aes-soft 0.5.0",
- "aesni 0.9.0",
- "ctr 0.5.0",
- "stream-cipher",
-]
-
 [[package]]
 name = "aes-ctr"
 version = "0.6.0"
@@ -129,7 +117,7 @@ dependencies = [
  "aes-soft 0.6.4",
  "aesni 0.10.0",
  "cipher",
- "ctr 0.6.0",
+ "ctr",
 ]
 
 [[package]]
@@ -154,7 +142,7 @@ dependencies = [
  "aead",
  "aes 0.6.0",
  "cipher",
- "ctr 0.6.0",
+ "ctr",
  "ghash",
  "subtle 2.3.0",
 ]
@@ -190,17 +178,6 @@ dependencies = [
  "opaque-debug 0.3.0",
 ]
 
-[[package]]
-name = "aesni"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6a4d655ae633a96d0acaf0fd7e76aafb8ca5732739bba37aac6f882c8fce656"
-dependencies = [
- "block-cipher",
- "opaque-debug 0.3.0",
- "stream-cipher",
-]
-
 [[package]]
 name = "aesni"
 version = "0.10.0"
@@ -659,9 +636,9 @@ dependencies = [
 
 [[package]]
 name = "bit-vec"
-version = "0.6.2"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f0dc55f2d8a1a85650ac47858bb001b4c0dd73d79e3c455a842925e68d29cd3"
+checksum = "349f9b6a179ed607305526ca489b34ad0a41aed5f7980fa90eb03160b69598fb"
 
 [[package]]
 name = "bitflags"
@@ -1448,15 +1425,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "ctr"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc03dee3a2843ac6eb4b5fb39cfcf4cb034d078555d1f4a0afbed418b822f3c2"
-dependencies = [
- "stream-cipher",
-]
-
 [[package]]
 name = "ctr"
 version = "0.6.0"
@@ -1692,7 +1660,7 @@ version = "0.1.0-beta.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ddad09a9bd70478c581a9f7e608a17962c5561a3ca7b1eb5b75cf1c6c3f124b8"
 dependencies = [
- "aes-ctr 0.6.0",
+ "aes-ctr",
  "aes-gcm 0.8.0",
  "arrayvec",
  "digest 0.9.0",
@@ -1700,7 +1668,7 @@ dependencies = [
  "fnv",
  "futures 0.3.8",
  "hex",
- "hkdf 0.10.0",
+ "hkdf",
  "k256",
  "lazy_static",
  "libp2p-core 0.23.1",
@@ -1712,39 +1680,7 @@ dependencies = [
  "sha2 0.9.2",
  "smallvec 1.5.0",
  "tokio 0.3.5",
- "tokio-util 0.5.0",
- "tracing",
- "tracing-subscriber",
- "uint",
- "zeroize",
-]
-
-[[package]]
-name = "discv5"
-version = "0.1.0-beta.2"
-source = "git+https://github.com/sigp/discv5?rev=f117b3ca56fa3dca2317270434634ff7106d391a#f117b3ca56fa3dca2317270434634ff7106d391a"
-dependencies = [
- "aes-ctr 0.6.0",
- "aes-gcm 0.8.0",
- "arrayvec",
- "digest 0.9.0",
- "enr",
- "fnv",
- "futures 0.3.8",
- "hex",
- "hkdf 0.9.0",
- "k256",
- "lazy_static",
- "libp2p-core 0.23.1",
- "lru_time_cache",
- "multihash 0.11.4",
- "parking_lot 0.11.1",
- "rand 0.7.3",
- "rlp",
- "sha2 0.9.2",
- "smallvec 1.5.0",
- "tokio 0.3.5",
- "tokio-util 0.4.0",
+ "tokio-util 0.5.1",
  "tracing",
  "tracing-subscriber",
  "uint",
@@ -1891,6 +1827,16 @@ name = "env_logger"
 version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "44533bbbb3bb3c1fa17d9f2e4e38bbbaf8396ba82193c4cb1b6445d711445d36"
+dependencies = [
+ "log 0.4.11",
+ "regex",
+]
+
+[[package]]
+name = "env_logger"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26ecb66b4bdca6c1409b40fb255eefc2bd4f6d135dab3c3124f80ffa2a9661e"
 dependencies = [
  "atty",
  "humantime",
@@ -2053,15 +1999,15 @@ dependencies = [
 name = "eth2_keystore"
 version = "0.1.0"
 dependencies = [
- "aes-ctr 0.5.0",
+ "aes-ctr",
  "bls",
  "eth2_key_derivation",
  "eth2_ssz",
  "hex",
- "hmac 0.9.0",
- "pbkdf2 0.5.0",
+ "hmac 0.10.1",
+ "pbkdf2 0.6.0",
  "rand 0.7.3",
- "scrypt 0.4.1",
+ "scrypt",
  "serde",
  "serde_json",
  "serde_repr",
@@ -2079,7 +2025,7 @@ dependencies = [
  "base64 0.13.0",
  "directory",
  "dirs 3.0.1",
- "discv5 0.1.0-beta.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "discv5",
  "error-chain",
  "eth2_ssz",
  "eth2_ssz_derive",
@@ -2762,7 +2708,7 @@ dependencies = [
  "indexmap",
  "slab 0.4.2",
  "tokio 0.3.5",
- "tokio-util 0.5.0",
+ "tokio-util 0.5.1",
  "tracing",
  "tracing-futures",
 ]
@@ -2797,7 +2743,7 @@ version = "0.2.0"
 dependencies = [
  "futures 0.3.8",
  "tokio 0.3.5",
- "tokio-util 0.4.0",
+ "tokio-util 0.5.1",
 ]
 
 [[package]]
@@ -2878,16 +2824,6 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b07f60793ff0a4d9cef0f18e63b5357e06209987153a64648c972c1e5aff336f"
 
-[[package]]
-name = "hkdf"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe1149865383e4526a43aee8495f9a325f0b806c63ce6427d06336a590abbbc9"
-dependencies = [
- "digest 0.9.0",
- "hmac 0.8.1",
-]
-
 [[package]]
 name = "hkdf"
 version = "0.10.0"
@@ -3017,8 +2953,8 @@ name = "http_api"
 version = "0.1.0"
 dependencies = [
  "beacon_chain",
- "bs58 0.3.1",
- "discv5 0.1.0-beta.2 (git+https://github.com/sigp/discv5?rev=f117b3ca56fa3dca2317270434634ff7106d391a)",
+ "bs58 0.4.0",
+ "discv5",
  "environment",
  "eth1",
  "eth2",
@@ -3110,12 +3046,9 @@ dependencies = [
 
 [[package]]
 name = "humantime"
-version = "1.3.0"
+version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df004cfca50ef23c36850aaaa59ad52cc70d0e90243c3c7737a4dd32dc7a3c4f"
-dependencies = [
- "quick-error",
-]
+checksum = "3c1ad908cc71012b7bea4d0c53ba96a8cba9962f048fa68d143376143d863b7a"
 
 [[package]]
 name = "hyper"
@@ -3354,7 +3287,7 @@ dependencies = [
 name = "int_to_bytes"
 version = "0.2.0"
 dependencies = [
- "bytes 0.5.6",
+ "bytes 0.6.0",
  "hex",
  "yaml-rust",
 ]
@@ -3716,7 +3649,7 @@ dependencies = [
  "lazy_static",
  "libsecp256k1",
  "log 0.4.11",
- "multihash 0.13.1",
+ "multihash 0.13.2",
  "multistream-select 0.8.5 (git+https://github.com/sigp/rust-libp2p?rev=e3caf9e0e5e78c9d51c6dccf0d6277cef553bb25)",
  "parity-multiaddr 0.9.6 (git+https://github.com/sigp/rust-libp2p?rev=e3caf9e0e5e78c9d51c6dccf0d6277cef553bb25)",
  "parking_lot 0.11.1",
@@ -3942,7 +3875,7 @@ dependencies = [
  "clap",
  "clap_utils",
  "directory",
- "env_logger",
+ "env_logger 0.8.2",
  "environment",
  "eth2_testnet_config",
  "futures 0.3.8",
@@ -4255,18 +4188,6 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
-[[package]]
-name = "mio-named-pipes"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0840c1c50fd55e521b247f949c241c9997709f23bd7f023b9762cd561e935656"
-dependencies = [
- "log 0.4.11",
- "mio 0.6.23",
- "miow 0.3.6",
- "winapi 0.3.9",
-]
-
 [[package]]
 name = "mio-uds"
 version = "0.6.8"
@@ -4317,9 +4238,9 @@ dependencies = [
 
 [[package]]
 name = "multihash"
-version = "0.13.1"
+version = "0.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb63389ee5fcd4df3f8727600f4a0c3df53c541f0ed4e8b50a9ae51a80fc1efe"
+checksum = "4dac63698b887d2d929306ea48b63760431ff8a24fac40ddb22f9c7f49fb7cab"
 dependencies = [
  "digest 0.9.0",
  "generic-array 0.14.4",
@@ -4330,9 +4251,9 @@ dependencies = [
 
 [[package]]
 name = "multihash-derive"
-version = "0.7.0"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f5653449cd45d502a53480ee08d7a599e8f4893d2bacb33c63d65bc20af6c1a"
+checksum = "85ee3c48cb9d9b275ad967a0e96715badc13c6029adb92f34fa17b9ff28fd81f"
 dependencies = [
  "proc-macro-crate",
  "proc-macro-error",
@@ -4557,9 +4478,9 @@ dependencies = [
 
 [[package]]
 name = "num-bigint-dig"
-version = "0.6.0"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3d03c330f9f7a2c19e3c0b42698e48141d0809c78cd9b6219f85bd7d7e892aa"
+checksum = "5d51546d704f52ef14b3c962b5776e53d5b862e5790e40a350d366c209bd7f7a"
 dependencies = [
  "autocfg 0.1.7",
  "byteorder",
@@ -4733,7 +4654,7 @@ dependencies = [
  "bs58 0.4.0",
  "byteorder",
  "data-encoding",
- "multihash 0.13.1",
+ "multihash 0.13.2",
  "percent-encoding 2.1.0",
  "serde",
  "static_assertions",
@@ -4846,11 +4767,11 @@ dependencies = [
 
 [[package]]
 name = "pbkdf2"
-version = "0.5.0"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7170d73bf11f39b4ce1809aabc95bf5c33564cdc16fc3200ddda17a5f6e5e48b"
+checksum = "b3b8c0d71734018084da0c0354193a5edfb81b20d2d57a92c5b154aefc554a4a"
 dependencies = [
- "crypto-mac 0.9.1",
+ "crypto-mac 0.10.0",
 ]
 
 [[package]]
@@ -5091,11 +5012,11 @@ dependencies = [
 
 [[package]]
 name = "prometheus"
-version = "0.10.0"
+version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "30d70cf4412832bcac9cffe27906f4a66e450d323525e977168c70d1b36120ae"
+checksum = "c8425533e7122f0c3cc7a37e6244b16ad3a2cc32ae7ac6276e2a75da0d9c200d"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
  "fnv",
  "lazy_static",
  "parking_lot 0.11.1",
@@ -5222,7 +5143,7 @@ version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a44883e74aa97ad63db83c4bf8ca490f02b2fc02f92575e720c8551e843c945f"
 dependencies = [
- "env_logger",
+ "env_logger 0.7.1",
  "log 0.4.11",
  "rand 0.7.3",
  "rand_core 0.5.1",
@@ -5819,6 +5740,15 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ef703b7cb59335eae2eb93ceb664c0eb7ea6bf567079d843e09420219668e072"
 
+[[package]]
+name = "salsa20"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "399f290ffc409596022fce5ea5d4138184be4784f2b28c62c59f0d8389059a15"
+dependencies = [
+ "cipher",
+]
+
 [[package]]
 name = "same-file"
 version = "1.0.6"
@@ -5867,23 +5797,13 @@ checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
 [[package]]
 name = "scrypt"
-version = "0.3.1"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10e7e75e27e8cd47e4be027d4b9fdc0b696116f981c22de21ca7bad63a9cb33a"
+checksum = "8da492dab03f925d977776a0b7233d7b934d6dc2b94faead48928e2e9bacedb9"
 dependencies = [
- "hmac 0.8.1",
- "pbkdf2 0.4.0",
- "sha2 0.9.2",
-]
-
-[[package]]
-name = "scrypt"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3437654bbbe34054a268b3859fe41f871215069b39f0aef78808d85c37100696"
-dependencies = [
- "hmac 0.9.0",
- "pbkdf2 0.5.0",
+ "hmac 0.10.1",
+ "pbkdf2 0.6.0",
+ "salsa20",
  "sha2 0.9.2",
 ]
 
@@ -5985,9 +5905,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.59"
+version = "1.0.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dcac07dbffa1c65e7f816ab9eba78eb142c6d44410f4eeba1e26e4f5dfa56b95"
+checksum = "1500e84d27fe482ed1dc791a56eddc2f230046a040fa908c08bda1d9fb615779"
 dependencies = [
  "itoa",
  "ryu",
@@ -6164,7 +6084,7 @@ name = "simulator"
 version = "0.2.0"
 dependencies = [
  "clap",
- "env_logger",
+ "env_logger 0.8.2",
  "eth1",
  "eth1_test_rig",
  "futures 0.3.8",
@@ -6221,7 +6141,7 @@ dependencies = [
  "slot_clock",
  "task_executor",
  "tempdir",
- "tokio 0.2.23",
+ "tokio 0.3.5",
  "tree_hash",
  "tree_hash_derive",
  "types",
@@ -6458,7 +6378,7 @@ dependencies = [
  "arbitrary",
  "bls",
  "criterion",
- "env_logger",
+ "env_logger 0.8.2",
  "eth2_hashing",
  "eth2_ssz",
  "eth2_ssz_types",
@@ -6955,17 +6875,12 @@ dependencies = [
  "futures-core",
  "iovec",
  "lazy_static",
- "libc",
  "memchr",
  "mio 0.6.23",
- "mio-named-pipes",
- "mio-uds",
  "num_cpus",
  "pin-project-lite 0.1.11",
- "signal-hook-registry",
  "slab 0.4.2",
  "tokio-macros 0.2.6",
- "winapi 0.3.9",
 ]
 
 [[package]]
@@ -7315,15 +7230,15 @@ dependencies = [
 
 [[package]]
 name = "tokio-util"
-version = "0.5.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73af76301319bcacf00d26d3c75534ef248dcad7ceaf36d93ec902453c3b1706"
+checksum = "3137de2b078e95274b696cc522e87f22c9a753fe3ef3344116ffb94f104f10a3"
 dependencies = [
  "bytes 0.6.0",
  "futures-core",
  "futures-sink",
  "log 0.4.11",
- "pin-project-lite 0.1.11",
+ "pin-project-lite 0.2.0",
  "slab 0.4.2",
  "tokio 0.3.5",
 ]
@@ -7744,7 +7659,7 @@ dependencies = [
  "rand 0.7.3",
  "rayon",
  "ring",
- "scrypt 0.3.1",
+ "scrypt",
  "serde",
  "serde_derive",
  "serde_json",
diff --git a/account_manager/Cargo.toml b/account_manager/Cargo.toml
index 6294c0c0c..fece15a78 100644
--- a/account_manager/Cargo.toml
+++ b/account_manager/Cargo.toml
@@ -27,7 +27,7 @@ eth2_wallet = { path = "../crypto/eth2_wallet" }
 eth2_wallet_manager = { path = "../common/eth2_wallet_manager" }
 rand = "0.7.3"
 validator_dir = { path = "../common/validator_dir" }
-tokio = { version = "0.3.2", features = ["full"] }
+tokio = { version = "0.3.5", features = ["full"] }
 eth2_keystore = { path = "../crypto/eth2_keystore" }
 account_utils = { path = "../common/account_utils" }
 slashing_protection = { path = "../validator_client/slashing_protection" }
diff --git a/beacon_node/client/Cargo.toml b/beacon_node/client/Cargo.toml
index cc9197eb9..49e0fd548 100644
--- a/beacon_node/client/Cargo.toml
+++ b/beacon_node/client/Cargo.toml
@@ -15,7 +15,7 @@ network = { path = "../network" }
 timer = { path = "../timer" }
 eth2_libp2p = { path = "../eth2_libp2p" }
 parking_lot = "0.11.0"
-prometheus = "0.10.0"
+prometheus = "0.11.0"
 types = { path = "../../consensus/types" }
 tree_hash = "0.1.1"
 eth2_config = { path = "../../common/eth2_config" }
diff --git a/beacon_node/eth2_libp2p/Cargo.toml b/beacon_node/eth2_libp2p/Cargo.toml
index 2e1bbbd1a..a0807b257 100644
--- a/beacon_node/eth2_libp2p/Cargo.toml
+++ b/beacon_node/eth2_libp2p/Cargo.toml
@@ -32,7 +32,7 @@ base64 = "0.13.0"
 snap = "1.0.1"
 void = "1.0.2"
 hex = "0.4.2"
-tokio-util = { version = "0.4.0", features = ["codec", "compat"] }
+tokio-util = { version = "0.4.0", features = ["codec", "compat", "time"] }
 tiny-keccak = "2.0.2"
 task_executor = { path = "../../common/task_executor" }
 rand = "0.7.3"
diff --git a/beacon_node/http_api/Cargo.toml b/beacon_node/http_api/Cargo.toml
index 29b5c6992..a35d832db 100644
--- a/beacon_node/http_api/Cargo.toml
+++ b/beacon_node/http_api/Cargo.toml
@@ -25,12 +25,12 @@ lazy_static = "1.4.0"
 warp_utils = { path = "../../common/warp_utils" }
 slot_clock = { path = "../../common/slot_clock" }
 eth2_ssz = { path = "../../consensus/ssz" }
-bs58 = "0.3.1"
+bs58 = "0.4.0"
 futures = "0.3.8"
 
 [dev-dependencies]
 store = { path = "../store" }
 environment = { path = "../../lighthouse/environment" }
 tree_hash = "0.1.1"
-discv5 = { git = "https://github.com/sigp/discv5", rev = "f117b3ca56fa3dca2317270434634ff7106d391a", features = ["libp2p"] }
+discv5 = { version = "0.1.0-beta.2", features = ["libp2p"] }
 tokio-compat-02 = "0.1"
diff --git a/beacon_node/http_metrics/Cargo.toml b/beacon_node/http_metrics/Cargo.toml
index df11b9958..ab2e53206 100644
--- a/beacon_node/http_metrics/Cargo.toml
+++ b/beacon_node/http_metrics/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-prometheus = "0.10.0"
+prometheus = "0.11.0"
 warp = { git = "https://github.com/sigp/warp ", branch = "lighthouse" }
 serde = { version = "1.0.116", features = ["derive"] }
 slog = "2.5.2"
diff --git a/beacon_node/store/src/impls.rs b/beacon_node/store/src/impls.rs
index b4bc1d581..b89bf1d40 100644
--- a/beacon_node/store/src/impls.rs
+++ b/beacon_node/store/src/impls.rs
@@ -15,7 +15,7 @@ impl<T: EthSpec> StoreItem for SignedBeaconBlock<T> {
 
         metrics::stop_timer(timer);
         metrics::inc_counter(&metrics::BEACON_BLOCK_WRITE_COUNT);
-        metrics::inc_counter_by(&metrics::BEACON_BLOCK_WRITE_BYTES, bytes.len() as i64);
+        metrics::inc_counter_by(&metrics::BEACON_BLOCK_WRITE_BYTES, bytes.len() as u64);
 
         bytes
     }
@@ -28,7 +28,7 @@ impl<T: EthSpec> StoreItem for SignedBeaconBlock<T> {
 
         metrics::stop_timer(timer);
         metrics::inc_counter(&metrics::BEACON_BLOCK_READ_COUNT);
-        metrics::inc_counter_by(&metrics::BEACON_BLOCK_READ_BYTES, len as i64);
+        metrics::inc_counter_by(&metrics::BEACON_BLOCK_READ_BYTES, len as u64);
 
         result
     }
diff --git a/beacon_node/store/src/impls/beacon_state.rs b/beacon_node/store/src/impls/beacon_state.rs
index 6cff12707..175095fc8 100644
--- a/beacon_node/store/src/impls/beacon_state.rs
+++ b/beacon_node/store/src/impls/beacon_state.rs
@@ -13,7 +13,7 @@ pub fn store_full_state<E: EthSpec>(
         let _overhead_timer = metrics::start_timer(&metrics::BEACON_STATE_WRITE_OVERHEAD_TIMES);
         StorageContainer::new(state).as_ssz_bytes()
     };
-    metrics::inc_counter_by(&metrics::BEACON_STATE_WRITE_BYTES, bytes.len() as i64);
+    metrics::inc_counter_by(&metrics::BEACON_STATE_WRITE_BYTES, bytes.len() as u64);
     metrics::inc_counter(&metrics::BEACON_STATE_WRITE_COUNT);
     let key = get_key_for_col(DBColumn::BeaconState.into(), state_root.as_bytes());
     ops.push(KeyValueStoreOp::PutKeyValue(key, bytes));
@@ -34,7 +34,7 @@ pub fn get_full_state<KV: KeyValueStore<E>, E: EthSpec>(
             metrics::stop_timer(overhead_timer);
             metrics::stop_timer(total_timer);
             metrics::inc_counter(&metrics::BEACON_STATE_READ_COUNT);
-            metrics::inc_counter_by(&metrics::BEACON_STATE_READ_BYTES, bytes.len() as i64);
+            metrics::inc_counter_by(&metrics::BEACON_STATE_READ_BYTES, bytes.len() as u64);
 
             Ok(Some(container.try_into()?))
         }
diff --git a/beacon_node/store/src/leveldb_store.rs b/beacon_node/store/src/leveldb_store.rs
index 04d0141af..5727351c9 100644
--- a/beacon_node/store/src/leveldb_store.rs
+++ b/beacon_node/store/src/leveldb_store.rs
@@ -61,7 +61,7 @@ impl<E: EthSpec> LevelDB<E> {
         let column_key = get_key_for_col(col, key);
 
         metrics::inc_counter(&metrics::DISK_DB_WRITE_COUNT);
-        metrics::inc_counter_by(&metrics::DISK_DB_WRITE_BYTES, val.len() as i64);
+        metrics::inc_counter_by(&metrics::DISK_DB_WRITE_BYTES, val.len() as u64);
         let timer = metrics::start_timer(&metrics::DISK_DB_WRITE_TIMES);
 
         self.db
@@ -103,7 +103,7 @@ impl<E: EthSpec> KeyValueStore<E> for LevelDB<E> {
             .map_err(Into::into)
             .map(|opt| {
                 opt.map(|bytes| {
-                    metrics::inc_counter_by(&metrics::DISK_DB_READ_BYTES, bytes.len() as i64);
+                    metrics::inc_counter_by(&metrics::DISK_DB_READ_BYTES, bytes.len() as u64);
                     metrics::stop_timer(timer);
                     bytes
                 })
diff --git a/common/hashset_delay/Cargo.toml b/common/hashset_delay/Cargo.toml
index cba88c5ec..c9a450ae7 100644
--- a/common/hashset_delay/Cargo.toml
+++ b/common/hashset_delay/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 
 [dependencies]
 futures = "0.3.7"
-tokio-util = { version = "0.4.0", features = ["time"] }
+tokio-util = { version = "0.5.0", features = ["time"] }
 
 [dev-dependencies]
 tokio = { version = "0.3.2", features = ["time", "rt-multi-thread", "macros"] }
diff --git a/common/lighthouse_metrics/Cargo.toml b/common/lighthouse_metrics/Cargo.toml
index a8380b85c..b6d35e9eb 100644
--- a/common/lighthouse_metrics/Cargo.toml
+++ b/common/lighthouse_metrics/Cargo.toml
@@ -8,4 +8,4 @@ edition = "2018"
 
 [dependencies]
 lazy_static = "1.4.0"
-prometheus = "0.10.0"
+prometheus = "0.11.0"
diff --git a/common/lighthouse_metrics/src/lib.rs b/common/lighthouse_metrics/src/lib.rs
index 39d759d1d..f848fb29c 100644
--- a/common/lighthouse_metrics/src/lib.rs
+++ b/common/lighthouse_metrics/src/lib.rs
@@ -221,7 +221,7 @@ pub fn inc_counter_vec(int_counter_vec: &Result<IntCounterVec>, name: &[&str]) {
     }
 }
 
-pub fn inc_counter_vec_by(int_counter_vec: &Result<IntCounterVec>, name: &[&str], amount: i64) {
+pub fn inc_counter_vec_by(int_counter_vec: &Result<IntCounterVec>, name: &[&str], amount: u64) {
     if let Some(counter) = get_int_counter(int_counter_vec, name) {
         counter.inc_by(amount);
     }
@@ -276,7 +276,7 @@ pub fn inc_counter(counter: &Result<IntCounter>) {
     }
 }
 
-pub fn inc_counter_by(counter: &Result<IntCounter>, value: i64) {
+pub fn inc_counter_by(counter: &Result<IntCounter>, value: u64) {
     if let Ok(counter) = counter {
         counter.inc_by(value);
     }
diff --git a/common/rest_types/Cargo.toml b/common/rest_types/Cargo.toml
index c7e33d8b4..9b6b82856 100644
--- a/common/rest_types/Cargo.toml
+++ b/common/rest_types/Cargo.toml
@@ -15,7 +15,7 @@ bls = { path = "../../crypto/bls" }
 serde = { version = "1.0.110", features = ["derive"] }
 rayon = "1.3.0"
 hyper = "0.13.5"
-tokio = { version = "0.2.22", features = ["sync"] }
+tokio = { version = "0.3.5", features = ["sync"] }
 environment = { path = "../../lighthouse/environment" }
 store = { path = "../../beacon_node/store" }
 beacon_chain = { path = "../../beacon_node/beacon_chain" }
diff --git a/consensus/int_to_bytes/Cargo.toml b/consensus/int_to_bytes/Cargo.toml
index 736fed9c8..e4f3389ba 100644
--- a/consensus/int_to_bytes/Cargo.toml
+++ b/consensus/int_to_bytes/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["Paul Hauner <paul@paulhauner.com>"]
 edition = "2018"
 
 [dependencies]
-bytes = "0.5.6"
+bytes = "0.6.0"
 
 [dev-dependencies]
 yaml-rust = "0.4.4"
diff --git a/consensus/state_processing/Cargo.toml b/consensus/state_processing/Cargo.toml
index 98ce4ff55..166e3ab5b 100644
--- a/consensus/state_processing/Cargo.toml
+++ b/consensus/state_processing/Cargo.toml
@@ -10,7 +10,7 @@ harness = false
 
 [dev-dependencies]
 criterion = "0.3.3"
-env_logger = "0.7.1"
+env_logger = "0.8.2"
 serde = "1.0.116"
 serde_derive = "1.0.116"
 lazy_static = "1.4.0"
diff --git a/crypto/eth2_keystore/Cargo.toml b/crypto/eth2_keystore/Cargo.toml
index d761b6e1e..132ade6c0 100644
--- a/crypto/eth2_keystore/Cargo.toml
+++ b/crypto/eth2_keystore/Cargo.toml
@@ -8,10 +8,10 @@ edition = "2018"
 
 [dependencies]
 rand = "0.7.3"
-aes-ctr = "0.5.0"
-hmac = "0.9.0"
-pbkdf2 = { version = "0.5.0", default-features = false }
-scrypt = { version = "0.4.1", default-features = false }
+aes-ctr = "0.6.0"
+hmac = "0.10.1"
+pbkdf2 = { version = "0.6.0", default-features = false }
+scrypt = { version = "0.5.0", default-features = false }
 sha2 = "0.9.1"
 uuid = { version = "0.8.1", features = ["serde", "v4"] }
 zeroize = { version = "1.1.1", features = ["zeroize_derive"] }
diff --git a/crypto/eth2_keystore/src/keystore.rs b/crypto/eth2_keystore/src/keystore.rs
index e16a565bf..1ed9fbbf4 100644
--- a/crypto/eth2_keystore/src/keystore.rs
+++ b/crypto/eth2_keystore/src/keystore.rs
@@ -7,8 +7,8 @@ use crate::json_keystore::{
     Kdf, KdfModule, Scrypt, Sha256Checksum, Version,
 };
 use crate::Uuid;
-use aes_ctr::stream_cipher::generic_array::GenericArray;
-use aes_ctr::stream_cipher::{NewStreamCipher, SyncStreamCipher};
+use aes_ctr::cipher::generic_array::GenericArray;
+use aes_ctr::cipher::{NewStreamCipher, SyncStreamCipher};
 use aes_ctr::Aes128Ctr as AesCtr;
 use bls::{Keypair, PublicKey, SecretKey, ZeroizeHash};
 use eth2_key_derivation::PlainText;
diff --git a/lighthouse/Cargo.toml b/lighthouse/Cargo.toml
index c413e24f7..3c1c4c4b0 100644
--- a/lighthouse/Cargo.toml
+++ b/lighthouse/Cargo.toml
@@ -22,7 +22,7 @@ sloggers = "1.0.1"
 types = { "path" = "../consensus/types" }
 bls = { path = "../crypto/bls" }
 clap = "2.33.3"
-env_logger = "0.7.1"
+env_logger = "0.8.2"
 logging = { path = "../common/logging" }
 slog-term = "2.6.0"
 slog-async = "2.5.0"
diff --git a/slasher/Cargo.toml b/slasher/Cargo.toml
index bd0bb1675..8ca9c2c02 100644
--- a/slasher/Cargo.toml
+++ b/slasher/Cargo.toml
@@ -24,7 +24,7 @@ slog = "2.5.2"
 sloggers = "*"
 slot_clock = { path = "../common/slot_clock" }
 task_executor = { path = "../common/task_executor" }
-tokio = { version = "0.2.21", features = ["full"] }
+tokio = { version = "0.3.5", features = ["full"] }
 tree_hash = { path = "../consensus/tree_hash" }
 tree_hash_derive = { path = "../consensus/tree_hash_derive" }
 types = { path = "../consensus/types" }
diff --git a/slasher/src/array.rs b/slasher/src/array.rs
index eff7518b6..4ef8de7f4 100644
--- a/slasher/src/array.rs
+++ b/slasher/src/array.rs
@@ -620,7 +620,7 @@ pub fn update_array<E: EthSpec, T: TargetArrayChunk>(
     metrics::inc_counter_vec_by(
         &SLASHER_NUM_CHUNKS_UPDATED,
         &[T::name()],
-        updated_chunks.len() as i64,
+        updated_chunks.len() as u64,
     );
 
     for (chunk_index, chunk) in updated_chunks {
diff --git a/testing/simulator/Cargo.toml b/testing/simulator/Cargo.toml
index 0ca9e9bfd..491a801cf 100644
--- a/testing/simulator/Cargo.toml
+++ b/testing/simulator/Cargo.toml
@@ -15,7 +15,7 @@ parking_lot = "0.11.0"
 futures = "0.3.7"
 tokio = "0.3.2"
 eth1_test_rig = { path = "../eth1_test_rig" }
-env_logger = "0.7.1"
+env_logger = "0.8.2"
 clap = "2.33.3"
 rayon = "1.4.1"
 tokio-compat-02 = "0.1"
diff --git a/validator_client/Cargo.toml b/validator_client/Cargo.toml
index 6491a2bb7..f8dab59d2 100644
--- a/validator_client/Cargo.toml
+++ b/validator_client/Cargo.toml
@@ -60,6 +60,6 @@ serde_utils = { path = "../consensus/serde_utils" }
 libsecp256k1 = "0.3.5"
 ring = "0.16.12"
 rand = "0.7.3"
-scrypt = { version = "0.3.1", default-features = false }
+scrypt = { version = "0.5.0", default-features = false }
 lighthouse_metrics = { path = "../common/lighthouse_metrics" }
 lazy_static = "1.4.0"