diff --git a/Cargo.lock b/Cargo.lock
index 9a19d35f8..b1fc6f937 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -9,12 +9,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "autocfg"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
-
 [[package]]
 name = "bytes"
 version = "1.0.1"
@@ -385,11 +379,10 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "1.5.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83f0c8e7c0addab50b663055baf787d0af7f413a46e6e7fb9559a4e4db7137a5"
+checksum = "fbbf1c778ec206785635ce8ad57fe52b3009ae9e0c9f574a728f3049d3e55838"
 dependencies = [
- "autocfg",
  "bytes",
  "memchr",
  "num_cpus",
@@ -399,9 +392,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-macros"
-version = "1.1.0"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "caf7b11a536f46a809a8a9f0bb4237020f70ecbf115b842360afb127ea2fda57"
+checksum = "b557f72f448c511a979e2564e55d74e6c4432fc96ff4f6241bc6bded342643b7"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index a56f92cac..1ba44760a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,13 +23,13 @@ futures = { version = "0.3", optional = true }
 pin-project = { version = "1.0.6", optional = true }
 quickcheck = { version = "1.0.3", optional = true }
 rand = { version = "0.8", features = ["getrandom", "small_rng"], optional = true }
-tokio = { version = "1.5.0", optional = true }
+tokio = { version = "1.15.0", optional = true }
 
 [dev-dependencies]
 itertools = "0.10.0"
 lazy_static = "1"
 quickcheck = "1.0.3"
-tokio = { version = "1.5.0", features = ["io-util", "macros", "rt-multi-thread"] }
+tokio = { version = "1.15.0", features = ["io-util", "macros", "rt-multi-thread"] }
 
 [[example]]
 name = "buggy_write"