diff --git a/Cargo.lock b/Cargo.lock
index 9232ff07..a4a1f94b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -91,9 +91,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.35"
+version = "1.0.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c0df63cb2955042487fad3aefd2c6e3ae7389ac5dc1beb28921de0b69f779d4"
+checksum = "68803225a7b13e47191bab76f2687382b60d259e8cf37f6e1893658b84bb9479"
 
 [[package]]
 name = "arrayref"
@@ -499,7 +499,7 @@ dependencies = [
 [[package]]
 name = "coins-ledger"
 version = "0.1.0"
-source = "git+https://github.com/summa-tx/bitcoins-rs#f53291fe9c5cae8007ff6e3c5384a5db839c9963"
+source = "git+https://github.com/summa-tx/bitcoins-rs?branch=master#f53291fe9c5cae8007ff6e3c5384a5db839c9963"
 dependencies = [
  "async-trait",
  "blake2b_simd",
@@ -530,9 +530,9 @@ dependencies = [
 
 [[package]]
 name = "const-oid"
-version = "0.3.5"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e143857ef5e50b46bba431bb0ed990426912f5eea85d6048214d8196d83efed"
+checksum = "c5d82796b70971fbb603900a5edc797a4d9be0f9ec1257f83a1dba0aa374e3e9"
 
 [[package]]
 name = "constant_time_eq"
@@ -651,6 +651,15 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "der"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51f59c66c30bb7445c8320a5f9233e437e3572368099f25532a59054328899b4"
+dependencies = [
+ "const-oid",
+]
+
 [[package]]
 name = "digest"
 version = "0.9.0"
@@ -662,9 +671,9 @@ dependencies = [
 
 [[package]]
 name = "ecdsa"
-version = "0.9.0"
+version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f488ad19df443921d9fa5b9ce13a282b552709c511d2d90b1fd635e0204d74d5"
+checksum = "41fbdb4ff710acb4db8ca29f93b897529ea6d6a45626d5183b47e012aa6ae7e4"
 dependencies = [
  "elliptic-curve",
  "hmac",
@@ -702,9 +711,9 @@ checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
 
 [[package]]
 name = "elliptic-curve"
-version = "0.7.1"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d02ac72d4e61713e291a2ae644c1bd82be82c21b9a0de2271e0aa6886b7e0b4"
+checksum = "592b1c857559479c056b73a3053c717108a70e4dce320ad28c79c63f5c2e62ba"
 dependencies = [
  "bitvec 0.18.4",
  "digest",
@@ -794,7 +803,6 @@ dependencies = [
  "ethers-middleware",
  "ethers-providers",
  "ethers-signers",
- "futures",
  "futures-util",
  "once_cell",
  "pin-project 1.0.2",
@@ -899,7 +907,6 @@ dependencies = [
  "reqwest",
  "rustc-hex",
  "serde",
- "serde-aux",
  "serde_json",
  "thiserror",
  "tokio",
@@ -1029,9 +1036,9 @@ checksum = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
 
 [[package]]
 name = "funty"
-version = "1.0.1"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ba62103ce691c2fd80fbae2213dfdda9ce60804973ac6b6e97de818ea7f52c8"
+checksum = "fed34cd105917e91daa4da6b3728c47b068749d6a62c59811f06ed2ac71d9da7"
 
 [[package]]
 name = "futures"
@@ -1084,16 +1091,16 @@ checksum = "611834ce18aaa1bd13c4b374f5d653e1027cf99b6b502584ff8c9a64413b30bb"
 
 [[package]]
 name = "futures-lite"
-version = "1.11.2"
+version = "1.11.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e6c079abfac3ab269e2927ec048dabc89d009ebfdda6b8ee86624f30c689658"
+checksum = "b4481d0cd0de1d204a4fa55e7d45f07b1d958abcb06714b3446438e2eff695fb"
 dependencies = [
  "fastrand",
  "futures-core",
  "futures-io",
  "memchr",
  "parking",
- "pin-project-lite 0.1.11",
+ "pin-project-lite 0.2.0",
  "waker-fn",
 ]
 
@@ -1440,9 +1447,9 @@ dependencies = [
 
 [[package]]
 name = "k256"
-version = "0.6.0"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4aebc14f2c1f2c5fd414f878084102b9ccb100fd90706e35979cd70a32f5d938"
+checksum = "e443f962f64bcd3753b09e9d6c3733986a81e49b2a36c3c2faaedbe2c3a8e7dd"
 dependencies = [
  "cfg-if 1.0.0",
  "ecdsa",
@@ -1711,9 +1718,9 @@ checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
 
 [[package]]
 name = "openssl"
-version = "0.10.31"
+version = "0.10.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d008f51b1acffa0d3450a68606e6a51c123012edaacb0f4e1426bd978869187"
+checksum = "038d43985d1ddca7a9900630d8cd031b56e4794eecc2e9ea39dd17aa04399a70"
 dependencies = [
  "bitflags",
  "cfg-if 1.0.0",
@@ -1731,9 +1738,9 @@ checksum = "77af24da69f9d9341038eba93a073b1fdaaa1b788221b00a69bce9e762cb32de"
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.59"
+version = "0.9.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de52d8eabd217311538a39bba130d7dea1f1e118010fee7a033d966845e7d5fe"
+checksum = "921fc71883267538946025deffb622905ecad223c28efbfdef9bb59a0175f3e6"
 dependencies = [
  "autocfg",
  "cc",
@@ -1744,9 +1751,9 @@ dependencies = [
 
 [[package]]
 name = "p256"
-version = "0.6.0"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4cead7739968fb4c7622c6664a9a3de0c9d92cb9e75b3a5f2467aad99b3cd3f5"
+checksum = "39f37a291d378ba3291c1fa4e925edb6729c8593d4c6064be79e4a4c12fa2d97"
 dependencies = [
  "ecdsa",
  "elliptic-curve",
@@ -1755,9 +1762,9 @@ dependencies = [
 
 [[package]]
 name = "p384"
-version = "0.5.0"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d97796d16cdc6bca56f1177aecaefb62c057fd8a0faa8b861e24d77a9e8993a"
+checksum = "ea33960aac2200d19a5c9ab06a11ebd48a37a23144496632c358182e6765d80b"
 dependencies = [
  "ecdsa",
  "elliptic-curve",
@@ -1856,11 +1863,11 @@ checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
 [[package]]
 name = "pkcs8"
-version = "0.1.1"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6529960a627342f19f68d43a07b268c98fd347e68668df3743a3cb9211c0975f"
+checksum = "b4839a901843f3942576e65857f0ebf2e190ef7024d3c62a94099ba3f819ad1d"
 dependencies = [
- "const-oid",
+ "der",
 ]
 
 [[package]]
@@ -1948,9 +1955,9 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "1.0.7"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aa563d17ecb180e500da1cfd2b028310ac758de548efdd203e18f283af693f37"
+checksum = "991431c3519a3f36861882da93630ce66b52918dcf1b8e2fd66b397fc96f28df"
 dependencies = [
  "proc-macro2",
 ]
@@ -2216,13 +2223,11 @@ dependencies = [
 
 [[package]]
 name = "serde-aux"
-version = "0.6.1"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae50f53d4b01e854319c1f5b854cd59471f054ea7e554988850d3f36ca1dc852"
+checksum = "3a16764e861bd10990815d72767548131b2084079170bedec7cbf5a8ade2daeb"
 dependencies = [
- "chrono",
  "serde",
- "serde_derive",
  "serde_json",
 ]
 
@@ -2329,13 +2334,12 @@ checksum = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
 
 [[package]]
 name = "socket2"
-version = "0.3.17"
+version = "0.3.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c29947abdee2a218277abeca306f25789c938e500ea5a9d4b12a5a504466902"
+checksum = "122e570113d28d773067fab24266b66753f6ea915758651696b6e35e49f88d6e"
 dependencies = [
  "cfg-if 1.0.0",
  "libc",
- "redox_syscall",
  "winapi 0.3.9",
 ]
 
@@ -2353,15 +2357,15 @@ checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
 [[package]]
 name = "subtle"
-version = "2.3.0"
+version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "343f3f510c2915908f155e94f17220b19ccfacf2a64a2a5d8004f2c3e311e7fd"
+checksum = "1e81da0851ada1f3e9d4312c704aa4f8806f0f9d69faaf8df2f3464b4a9437c2"
 
 [[package]]
 name = "syn"
-version = "1.0.54"
+version = "1.0.55"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a2af957a63d6bd42255c359c93d9bfdb97076bd3b820897ce55ffbfbf107f44"
+checksum = "a571a711dddd09019ccc628e1b17fe87c59b09d513c06c026877aa708334f37a"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2559,21 +2563,9 @@ dependencies = [
  "cfg-if 1.0.0",
  "log",
  "pin-project-lite 0.2.0",
- "tracing-attributes",
  "tracing-core",
 ]
 
-[[package]]
-name = "tracing-attributes"
-version = "0.1.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "80e0ccfc3378da0cce270c946b676a376943f5cd16aeba64568e7939806f4ada"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "tracing-core"
 version = "0.1.17"
@@ -2940,9 +2932,9 @@ dependencies = [
 
 [[package]]
 name = "yubihsm"
-version = "0.36.0"
+version = "0.37.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51532710eb5ea9e981ee3553f60c252a5ef7e6a4275ec529756fb6c39dee78c1"
+checksum = "c1a94c32e288e71c5dfb4851b91ce0d997e8ad96b0ce4db28ab108f406df6124"
 dependencies = [
  "aes",
  "anomaly",
diff --git a/ethers-contract/Cargo.toml b/ethers-contract/Cargo.toml
index 2d1e01dd..6c568c18 100644
--- a/ethers-contract/Cargo.toml
+++ b/ethers-contract/Cargo.toml
@@ -10,25 +10,23 @@ repository = "https://github.com/gakonst/ethers-rs"
 keywords = ["ethereum", "web3", "celo", "ethers"]
 
 [dependencies]
+ethers-providers = { version = "0.1.3", path = "../ethers-providers", default-features = false }
+ethers-core = { version = "0.1.3", path = "../ethers-core", default-features = false }
+
 ethers-contract-abigen = { version = "0.1.3", path = "ethers-contract-abigen", optional = true }
 ethers-contract-derive = { version = "0.1.3", path = "ethers-contract-derive", optional = true }
 
-ethers-providers = { version = "0.1.3", path = "../ethers-providers" }
-ethers-core = { version = "0.1.3", path = "../ethers-core" }
-
-serde = { version = "1.0.110", default-features = false }
-serde_json = "1.0.55"
+serde = { version = "1.0.118", default-features = false }
+serde_json = { version = "1.0.60", default-features = false }
 rustc-hex = { version = "2.1.0", default-features = false }
-thiserror = { version = "1.0.15", default-features = false }
-once_cell = { version = "1.3.1", default-features = false }
-futures = "0.3.5"
-futures-util = "0.3.8"
-pin-project = "1.0.2"
+thiserror = { version = "1.0.22", default-features = false }
+once_cell = { version = "1.5.2", default-features = false }
+pin-project = {version = "1.0.2", default-features = false }
+futures-util = { version = "0.3.8", default-features = false }
 
 [dev-dependencies]
 ethers = { version = "0.1.3", path = "../ethers" }
 tokio = { version = "0.2.21", default-features = false, features = ["macros"] }
-serde_json = "1.0.55"
 
 ethers-signers = { version = "0.1.3", path = "../ethers-signers" }
 ethers-middleware = { version = "0.1.3", path = "../ethers-middleware" }
diff --git a/ethers-contract/ethers-contract-abigen/Cargo.toml b/ethers-contract/ethers-contract-abigen/Cargo.toml
index 0124a0ac..b0112429 100644
--- a/ethers-contract/ethers-contract-abigen/Cargo.toml
+++ b/ethers-contract/ethers-contract-abigen/Cargo.toml
@@ -12,7 +12,7 @@ keywords = ["ethereum", "web3", "celo", "ethers"]
 [dependencies]
 ethers-core = { version = "0.1.3", path = "../../ethers-core" }
 
-anyhow = "1.0"
+anyhow = "1.0.36"
 curl = "0.4"
 Inflector = "0.11"
 proc-macro2 = "1.0"
diff --git a/ethers-contract/src/stream.rs b/ethers-contract/src/stream.rs
index 938c796f..c8671902 100644
--- a/ethers-contract/src/stream.rs
+++ b/ethers-contract/src/stream.rs
@@ -1,5 +1,5 @@
 use ethers_core::types::{Log, U256};
-use futures::stream::{Stream, StreamExt};
+use futures_util::stream::{Stream, StreamExt};
 use pin_project::pin_project;
 use std::pin::Pin;
 use std::task::{Context, Poll};
diff --git a/ethers-core/Cargo.toml b/ethers-core/Cargo.toml
index c9ddda06..1133d3c4 100644
--- a/ethers-core/Cargo.toml
+++ b/ethers-core/Cargo.toml
@@ -11,31 +11,31 @@ keywords = ["ethereum", "web3", "celo", "ethers"]
 
 [dependencies]
 # ethereum related
-ethereum-types = { version = "0.9.2", default-features = false, features = ["serialize"] }
-rlp = { version = "0.4.5", default-features = false }
+ethereum-types = { version = "0.9.2", default-features = false }
+rlp = { version = "0.4.6", default-features = false }
 ethabi = { package = "ethabi-next", version = "12.0.0", default-features = false }
 arrayvec = { version = "0.5.1", default-features = false }
 
 # crypto
-ecdsa = { version = "0.9.0", features = ["std"] }
-elliptic-curve = { version = "0.7.1", features = ["arithmetic"] }
-generic-array = "0.14.4"
-k256 = { version = "0.6.0", default-features = false, features = ["keccak256", "ecdsa"] }
-rand = "0.7.2"
+ecdsa = { version = "0.10.2", default-features = false, features = ["std"] }
+elliptic-curve = { version = "0.8.4", default-features = false }
+generic-array = { version = "0.14.4", default-features = false }
+k256 = { version = "0.7.1", default-features = false, features = ["keccak256", "ecdsa"] }
+rand = { version = "0.7.1", default-features = false }
 tiny-keccak = { version = "2.0.2", default-features = false }
 
 # misc
-serde = { version = "1.0.110", default-features = false, features = ["derive"] }
-serde_json = { version = "1.0.53", default-features = false, features = ["alloc"] }
+serde = { version = "1.0.118", default-features = false, features = ["derive"] }
+serde_json = { version = "1.0.60", default-features = false }
 rustc-hex = { version = "2.1.0", default-features = false }
-thiserror = { version = "1.0.15", default-features = false }
-glob = "0.3.0"
+thiserror = { version = "1.0.22", default-features = false }
+glob = { version = "0.3.0", default-features = false }
 
 [dev-dependencies]
 ethers = { version = "0.1.3", path = "../ethers" }
 
 serde_json = { version = "1.0.53", default-features = false }
-bincode = "1.2.1"
+bincode = { version = "1.2.1", default-features = false }
 
 [features]
 celo = [] # celo support extends the transaction format with extra fields
diff --git a/ethers-middleware/Cargo.toml b/ethers-middleware/Cargo.toml
index b455dc4b..d61df37f 100644
--- a/ethers-middleware/Cargo.toml
+++ b/ethers-middleware/Cargo.toml
@@ -14,31 +14,29 @@ all-features = true
 rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
-ethers-core = { version = "0.1.3", path = "../ethers-core" }
-ethers-providers = { version = "0.1.3", path = "../ethers-providers" }
-ethers-signers = { version = "0.1.3", path = "../ethers-signers" }
+ethers-core = { version = "0.1.3", path = "../ethers-core", default-features = false }
+ethers-providers = { version = "0.1.3", path = "../ethers-providers", default-features = false }
+ethers-signers = { version = "0.1.3", path = "../ethers-signers", default-features = false }
 
-async-trait = { version = "0.1.31", default-features = false }
-serde = { version = "1.0.110", default-features = false, features = ["derive"] }
-thiserror = { version = "1.0.15", default-features = false }
-
-futures-util = { version = "0.3.5", default-features = false }
+async-trait = { version = "0.1.42", default-features = false }
+serde = { version = "1.0.118", default-features = false, features = ["derive"] }
+thiserror = { version = "1.0.22", default-features = false }
+futures-util = { version = "0.3.8", default-features = false }
+tracing = { version = "0.1.22", default-features = false }
+tracing-futures = { version = "0.2.4", default-features = false }
 
 # for gas oracles
-serde-aux = "0.6.1"
-reqwest = { version = "0.10.4", default-features = false, features = ["json", "rustls-tls"] }
-url = { version = "2.1.1", default-features = false }
+serde-aux = { version = "2.1.0", default-features = false }
+reqwest = { version = "0.10.10", default-features = false, features = ["json", "rustls-tls"] }
+url = { version = "2.2.0", default-features = false }
 
 # optional for runtime
 tokio = { version = "0.2.22", optional = true }
 async-std = { version = "1.6.5", optional = true }
-tracing = "0.1.22"
-tracing-futures = "0.2.4"
 
 [dev-dependencies]
 ethers = { version = "0.1.3", path = "../ethers" }
 futures-executor = { version = "0.3.5", features = ["thread-pool"] }
-
 rustc-hex = "2.1.0"
 tokio = { version = "0.2.21", default-features = false, features = ["rt-core", "macros"] }
 
diff --git a/ethers-providers/Cargo.toml b/ethers-providers/Cargo.toml
index 4b979370..24a7284d 100644
--- a/ethers-providers/Cargo.toml
+++ b/ethers-providers/Cargo.toml
@@ -14,37 +14,35 @@ all-features = true
 rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
-ethers-core = { version = "0.1.3", path = "../ethers-core" }
+ethers-core = { version = "0.1.3", path = "../ethers-core", default-features = false }
 
-async-trait = { version = "0.1.31", default-features = false }
-reqwest = { version = "0.10.4", default-features = false, features = ["json", "rustls-tls"] }
-serde = { version = "1.0.110", default-features = false, features = ["derive"] }
-serde_json = { version = "1.0.53", default-features = false }
-thiserror = { version = "1.0.15", default-features = false }
-url = { version = "2.1.1", default-features = false }
+async-trait = { version = "0.1.42", default-features = false }
+reqwest = { version = "0.10.10", default-features = false, features = ["json", "rustls-tls"] }
+serde = { version = "1.0.118", default-features = false, features = ["derive"] }
+serde_json = { version = "1.0.60", default-features = false }
+thiserror = { version = "1.0.22", default-features = false }
+url = { version = "2.2.0", default-features = false }
+auto_impl = { version = "0.4.1", default-features = false }
 
 # required for implementing stream on the filters
-futures-core = { version = "0.3.5", default-features = false }
-futures-util = { version = "0.3.5", default-features = false }
+futures-core = { version = "0.3.8", default-features = false }
+futures-util = { version = "0.3.8", default-features = false }
 futures-timer = { version = "3.0.2", default-features = false }
 futures-channel = { version = "0.3.8", default-features = false }
 pin-project = { version = "1.0.2", default-features = false }
 
+# tracing
+tracing = { version = "0.1.22", default-features = false }
+tracing-futures = { version = "0.2.4", default-features = false }
+
 # ws support async-std and tokio runtimes for the convenience methods
 async-tungstenite = { version = "0.6.0", default-features = false, optional = true }
 async-std = { version = "1.6.2", default-features = false, optional = true }
 tokio = { version = "0.2.21", default-features = false, optional = true }
-
 # needed for tls
-real-tokio-native-tls = { package = "tokio-native-tls", version = "0.1.0", optional = true }
+real-tokio-native-tls = { package = "tokio-native-tls", version = "0.1.0", default-features = false, optional = true }
 async-tls = { version = "0.7.0", optional = true }
 
-# needed for parsing while deserialization in gas oracles
-serde-aux = "0.6.1"
-auto_impl = "0.4.1"
-tracing = "0.1.22"
-tracing-futures = "0.2.4"
-
 [dev-dependencies]
 ethers = { version = "0.1.3", path = "../ethers" }
 
diff --git a/ethers-signers/Cargo.toml b/ethers-signers/Cargo.toml
index 7d2b34d8..88ae1983 100644
--- a/ethers-signers/Cargo.toml
+++ b/ethers-signers/Cargo.toml
@@ -15,26 +15,25 @@ rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
 ethers-core = { version = "0.1.3", path = "../ethers-core" }
-thiserror = { version = "1.0.15", default-features = false }
-futures-util = { version = "0.3.5", default-features = false }
-futures-executor = { version = "0.3.5", default-features = false }
-serde = { version = "1.0.112", default-features = false }
+thiserror = { version = "1.0.22", default-features = false }
+futures-util = { version = "0.3.8", default-features = false }
+futures-executor = { version = "0.3.8", default-features = false }
+serde = { version = "1.0.118", default-features = false }
 
-coins-ledger = { git = "https://github.com/summa-tx/bitcoins-rs", optional = true }
-rustc-hex = { version = "2.1.0" }
-async-trait = "0.1.40"
-elliptic-curve = { version = "0.7.1", features = ["arithmetic"] }
-sha2 = { version = "0.9.1" }
-rand = "0.7.3"
-
-yubihsm = { version = "0.36.0", features = ["secp256k1", "http", "usb"], optional = true }
+coins-ledger = { git = "https://github.com/summa-tx/bitcoins-rs", default-features = false, optional = true, branch = "master" }
+rustc-hex = { version = "2.1.0", default-features = false }
+async-trait = { version = "0.1.40", default-features = false }
+elliptic-curve = { version = "0.8.4", default-features = false }
+sha2 = { version = "0.9.2", default-features = false }
+rand = { version = "0.7.3", default-features = false }
+yubihsm = { version = "0.37.0", features = ["secp256k1", "http", "usb"], optional = true }
 
 [dev-dependencies]
 ethers = { version = "0.1.3", path = "../ethers" }
-yubihsm = { version = "0.36.0", features = ["secp256k1", "usb", "mockhsm"] }
+yubihsm = { version = "0.37.0", features = ["secp256k1", "usb", "mockhsm"] }
 
-tokio = { version = "0.2.21", features = ["macros"] }
-serde_json = "1.0.55"
+tokio = { version = "0.2.21", default-features = false, features = ["macros"] }
+serde_json = { version = "1.0.55", default-features = false }  
 
 [features]
 celo = ["ethers-core/celo"]