diff --git a/Cargo.lock b/Cargo.lock
index 33a860b0..0384ce44 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -43,7 +43,7 @@ dependencies = [
  "pin-project-lite 0.2.8",
  "proptest",
  "proptest-derive",
- "rand 0.7.3",
+ "rand",
  "tokio 0.2.25",
  "tokio 0.3.7",
  "tokio 1.15.0",
@@ -56,12 +56,6 @@ dependencies = [
  "zstd-safe",
 ]
 
-[[package]]
-name = "autocfg"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
-
 [[package]]
 name = "autocfg"
 version = "1.0.1"
@@ -170,15 +164,6 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
-[[package]]
-name = "cloudabi"
-version = "0.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
-dependencies = [
- "bitflags",
-]
-
 [[package]]
 name = "crc32fast"
 version = "1.3.1"
@@ -215,12 +200,6 @@ version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
-[[package]]
-name = "fuchsia-cprng"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
-
 [[package]]
 name = "futures"
 version = "0.3.19"
@@ -341,9 +320,9 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.1.16"
+version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8fc3cb4d91f53b50155bdcfd23f6a4c39ae1969c2ae85982b135750cccaf5fce"
+checksum = "9be70c98951c83b8d2f8f60d7065fa6d5146873094452a1008da8c2f1e4205ad"
 dependencies = [
  "cfg-if",
  "libc",
@@ -376,9 +355,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.114"
+version = "0.2.125"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0005d08a8f7b65fb8073cb697aa0b12b631ed251ce73d862ce50eeb52ce3b50"
+checksum = "5916d2ae698f6de9bfb891ad7a8d65c09d232dc58cc4ac433c7da3b2fd84bc2b"
 
 [[package]]
 name = "log"
@@ -413,14 +392,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a92518e98c078586bc6c934028adcca4c92a53d6a958196de835170a01d84e4b"
 dependencies = [
  "adler",
- "autocfg 1.0.1",
+ "autocfg",
 ]
 
 [[package]]
 name = "ntest"
-version = "0.7.3"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "984caf6c8aa869418ef88062fc685d07d50c04308e63f7eaff6a395b1f5aff33"
+checksum = "5c544e496c816f0a59645c0bb69097e453df203954ae2ed4b3ac4251fad69d44"
 dependencies = [
  "ntest_proc_macro_helper",
  "ntest_test_cases",
@@ -429,15 +408,15 @@ dependencies = [
 
 [[package]]
 name = "ntest_proc_macro_helper"
-version = "0.7.3"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "115562228962147ca51748d19446a4261535a7b6a7b5ff02681e527dcefc22f7"
+checksum = "8f52e34b414605b77efc95c3f0ecef01df0c324bcc7f68d9a9cb7a7552777e52"
 
 [[package]]
 name = "ntest_test_cases"
-version = "0.7.3"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c03e3201148714c580c5cf1ef68b1ed4039203068193197834a43503164b8237"
+checksum = "99a81eb400abc87063f829560bc5c5c835177703b83d1cd991960db0b2a00abe"
 dependencies = [
  "proc-macro2 1.0.36",
  "quote 1.0.15",
@@ -446,9 +425,9 @@ dependencies = [
 
 [[package]]
 name = "ntest_timeout"
-version = "0.7.3"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a870300c30d4224cb16022a4660fd8084d6cb4d29618563c3016b50cc757d1e7"
+checksum = "b10db009e117aca57cbfb70ac332348f9a89d09ff7204497c283c0f7a0c96323"
 dependencies = [
  "ntest_proc_macro_helper",
  "proc-macro-crate",
@@ -463,7 +442,7 @@ version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
 dependencies = [
- "autocfg 1.0.1",
+ "autocfg",
 ]
 
 [[package]]
@@ -538,10 +517,11 @@ checksum = "eb9f9e6e233e5c4a35559a617bf40a4ec447db2e84c20b55a6f83167b7e57872"
 
 [[package]]
 name = "proc-macro-crate"
-version = "0.1.5"
+version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d6ea3c4595b96363c13943497db34af4460fb474a95c43f4446ad341b8c9785"
+checksum = "e17d47ce914bf4de440332250b0edd23ce48c005f59fab39d3335866b114f11a"
 dependencies = [
+ "thiserror",
  "toml",
 ]
 
@@ -565,18 +545,18 @@ dependencies = [
 
 [[package]]
 name = "proptest"
-version = "0.9.6"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "01c477819b845fe023d33583ebf10c9f62518c8d79a0960ba5c36d6ac8a55a5b"
+checksum = "1e0d9cc07f18492d879586c92b485def06bc850da3118075cd45d50e9c95b0e5"
 dependencies = [
  "bit-set",
  "bitflags",
  "byteorder",
  "lazy_static",
  "num-traits",
- "quick-error",
- "rand 0.6.5",
- "rand_chacha 0.1.1",
+ "quick-error 2.0.1",
+ "rand",
+ "rand_chacha",
  "rand_xorshift",
  "regex-syntax",
  "rusty-fork",
@@ -585,9 +565,9 @@ dependencies = [
 
 [[package]]
 name = "proptest-derive"
-version = "0.1.2"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d31edb17edac73aeacc947bd61462dda15220584268896a58e12f053d767f15b"
+checksum = "90b46295382dc76166cb7cf2bb4a97952464e4b7ed5a43e6cd34e1fec3349ddc"
 dependencies = [
  "proc-macro2 0.4.30",
  "quote 0.6.13",
@@ -600,6 +580,12 @@ version = "1.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
 
+[[package]]
+name = "quick-error"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a993555f31e5a609f617c12db6250dedcac1b0a85076912c436e6fc9b2c8e6a3"
+
 [[package]]
 name = "quote"
 version = "0.6.13"
@@ -620,158 +606,41 @@ dependencies = [
 
 [[package]]
 name = "rand"
-version = "0.6.5"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d71dacdc3c88c1fde3885a3be3fbab9f35724e6ce99467f7d9c5026132184ca"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
 dependencies = [
- "autocfg 0.1.7",
  "libc",
- "rand_chacha 0.1.1",
- "rand_core 0.4.2",
- "rand_hc 0.1.0",
- "rand_isaac",
- "rand_jitter",
- "rand_os",
- "rand_pcg",
- "rand_xorshift",
- "winapi",
-]
-
-[[package]]
-name = "rand"
-version = "0.7.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a6b1679d49b24bbfe0c803429aa1874472f50d9b363131f0e89fc356b544d03"
-dependencies = [
- "getrandom",
- "libc",
- "rand_chacha 0.2.2",
- "rand_core 0.5.1",
- "rand_hc 0.2.0",
+ "rand_chacha",
+ "rand_core",
 ]
 
 [[package]]
 name = "rand_chacha"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "556d3a1ca6600bfcbab7c7c91ccb085ac7fbbcd70e008a98742e7847f4f7bcef"
-dependencies = [
- "autocfg 0.1.7",
- "rand_core 0.3.1",
-]
-
-[[package]]
-name = "rand_chacha"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f4c8ed856279c9737206bf725bf36935d8666ead7aa69b52be55af369d193402"
-dependencies = [
- "ppv-lite86",
- "rand_core 0.5.1",
-]
-
-[[package]]
-name = "rand_core"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
 dependencies = [
- "rand_core 0.4.2",
+ "ppv-lite86",
+ "rand_core",
 ]
 
 [[package]]
 name = "rand_core"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
-
-[[package]]
-name = "rand_core"
-version = "0.5.1"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
+checksum = "d34f1408f55294453790c48b2f1ebbb1c5b4b7563eb1f418bcfcfdbb06ebb4e7"
 dependencies = [
  "getrandom",
 ]
 
-[[package]]
-name = "rand_hc"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b40677c7be09ae76218dc623efbf7b18e34bced3f38883af07bb75630a21bc4"
-dependencies = [
- "rand_core 0.3.1",
-]
-
-[[package]]
-name = "rand_hc"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
-dependencies = [
- "rand_core 0.5.1",
-]
-
-[[package]]
-name = "rand_isaac"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ded997c9d5f13925be2a6fd7e66bf1872597f759fd9dd93513dd7e92e5a5ee08"
-dependencies = [
- "rand_core 0.3.1",
-]
-
-[[package]]
-name = "rand_jitter"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1166d5c91dc97b88d1decc3285bb0a99ed84b05cfd0bc2341bdf2d43fc41e39b"
-dependencies = [
- "libc",
- "rand_core 0.4.2",
- "winapi",
-]
-
-[[package]]
-name = "rand_os"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b75f676a1e053fc562eafbb47838d67c84801e38fc1ba459e8f180deabd5071"
-dependencies = [
- "cloudabi",
- "fuchsia-cprng",
- "libc",
- "rand_core 0.4.2",
- "rdrand",
- "winapi",
-]
-
-[[package]]
-name = "rand_pcg"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "abf9b09b01790cfe0364f52bf32995ea3c39f4d2dd011eac241d2914146d0b44"
-dependencies = [
- "autocfg 0.1.7",
- "rand_core 0.4.2",
-]
-
 [[package]]
 name = "rand_xorshift"
-version = "0.1.1"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cbf7e9e623549b0e21f6e97cf8ecf247c1a8fd2e8a992ae265314300b2455d5c"
+checksum = "d25bf25ec5ae4a3f1b92f929810509a2f53d7dca2f50b794ff57e3face536c8f"
 dependencies = [
- "rand_core 0.3.1",
-]
-
-[[package]]
-name = "rdrand"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
-dependencies = [
- "rand_core 0.3.1",
+ "rand_core",
 ]
 
 [[package]]
@@ -800,12 +669,12 @@ dependencies = [
 
 [[package]]
 name = "rusty-fork"
-version = "0.2.2"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3dd93264e10c577503e926bd1430193eeb5d21b059148910082245309b424fae"
+checksum = "cb3dcc6e454c328bb824492db107ab7c0ae8fcffe4ad210136ef014458c1bc4f"
 dependencies = [
  "fnv",
- "quick-error",
+ "quick-error 1.2.3",
  "tempfile",
  "wait-timeout",
 ]
@@ -858,6 +727,26 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "thiserror"
+version = "1.0.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd829fe32373d27f76265620b5309d0340cb8550f523c1dda251d6298069069a"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0396bc89e626244658bef819e22d0cc459e795a5ebe878e6ec336d1674a8d79a"
+dependencies = [
+ "proc-macro2 1.0.36",
+ "quote 1.0.15",
+ "syn 1.0.86",
+]
+
 [[package]]
 name = "tokio"
 version = "0.2.25"
@@ -878,7 +767,7 @@ version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46409491c9375a693ce7032101970a54f8a2010efb77e13f70788f0d84489e39"
 dependencies = [
- "autocfg 1.0.1",
+ "autocfg",
  "bytes 0.6.0",
  "futures-core",
  "memchr",
@@ -995,9 +884,9 @@ dependencies = [
 
 [[package]]
 name = "wasi"
-version = "0.9.0+wasi-snapshot-preview1"
+version = "0.10.2+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
 
 [[package]]
 name = "winapi"
diff --git a/Cargo.toml b/Cargo.toml
index c7366b16..2bc87d9a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -52,12 +52,12 @@ tokio-03 = { package = "tokio", version = "0.3.0", optional = true, default-feat
 tokio = { version = "1.0.0", optional = true, default-features = false }
 
 [dev-dependencies]
-proptest = "0.9.4"
-proptest-derive = "0.1.2"
-rand = "0.7.2"
+proptest = "1.0.0"
+proptest-derive = "0.3.0"
+rand = "0.8.5"
 futures = "0.3.5"
 futures-test = "0.3.5"
-ntest = "0.7.3"
+ntest = "0.7.5"
 bytes-05 = { package = "bytes", version = "0.5.0" }
 bytes-06 = { package = "bytes", version = "0.6.0" }
 bytes = "1.0.0"