diff --git a/Cargo.lock b/Cargo.lock
index 154bebc..fd018d1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -201,6 +201,15 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "cloudabi"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4344512281c643ae7638bbabc3af17a11307803ec8f0fcad9fae512a8bf36467"
+dependencies = [
+ "bitflags",
+]
+
 [[package]]
 name = "colored"
 version = "1.9.3"
@@ -602,7 +611,7 @@ dependencies = [
  "indexmap",
  "log",
  "slab",
- "tokio 0.2.21",
+ "tokio 0.2.22",
  "tokio-util",
 ]
 
@@ -730,7 +739,7 @@ dependencies = [
  "net2",
  "pin-project",
  "time 0.1.43",
- "tokio 0.2.21",
+ "tokio 0.2.22",
  "tower-service",
  "want 0.3.0",
 ]
@@ -744,7 +753,7 @@ dependencies = [
  "bytes 0.5.4",
  "hyper 0.13.5",
  "native-tls",
- "tokio 0.2.21",
+ "tokio 0.2.22",
  "tokio-tls",
 ]
 
@@ -757,6 +766,15 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "instant"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63312a18f7ea8760cdd0a7c5aac1a619752a246b833545e3e36d1f81f7cd9e66"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "iovec"
 version = "0.1.4"
@@ -795,7 +813,7 @@ dependencies = [
  "lambda-attributes",
  "serde",
  "serde_json",
- "tokio 0.2.21",
+ "tokio 0.2.22",
  "tower-service",
  "tracing",
  "tracing-error",
@@ -861,9 +879,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.69"
+version = "0.2.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99e85c08494b21a9054e7fe1374a732aeadaff3980b6990b94bfd3a70f690005"
+checksum = "2448f6066e80e3bfc792e9c98bf705b4b0fc6e8ef5b43e5889aff0eaa9c58743"
 
 [[package]]
 name = "lock_api"
@@ -874,6 +892,15 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "lock_api"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "28247cc5a5be2f05fbcd76dd0cf2c7d3b5400cb978a28042abcd4fa0b3f8261c"
+dependencies = [
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.4.8"
@@ -929,6 +956,19 @@ dependencies = [
  "winapi 0.2.8",
 ]
 
+[[package]]
+name = "mio"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e53a6ea5f38c0a48ca42159868c6d8e1bd56c0451238856cc08d58563643bdc3"
+dependencies = [
+ "libc",
+ "log",
+ "miow 0.3.3",
+ "ntapi",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "mio-named-pipes"
 version = "0.1.6"
@@ -936,7 +976,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f5e374eff525ce1c5b7687c4cef63943e7686524a387933ad27ca7ec43779cb3"
 dependencies = [
  "log",
- "mio",
+ "mio 0.6.21",
  "miow 0.3.3",
  "winapi 0.3.8",
 ]
@@ -949,7 +989,7 @@ checksum = "966257a94e196b11bb43aca423754d87429960a768de9414f3691d6957abf125"
 dependencies = [
  "iovec",
  "libc",
- "mio",
+ "mio 0.6.21",
 ]
 
 [[package]]
@@ -1003,6 +1043,15 @@ dependencies = [
  "winapi 0.3.8",
 ]
 
+[[package]]
+name = "ntapi"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a31937dea023539c72ddae0e3571deadc1414b300483fa7aaec176168cfa9d2"
+dependencies = [
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "num-integer"
 version = "0.1.42"
@@ -1077,11 +1126,22 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f842b1982eb6c2fe34036a4fbfb06dd185a3f5c8edfaacdf7d1ea10b07de6252"
 dependencies = [
- "lock_api",
- "parking_lot_core",
+ "lock_api 0.3.4",
+ "parking_lot_core 0.6.2",
  "rustc_version 0.2.3",
 ]
 
+[[package]]
+name = "parking_lot"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4893845fa2ca272e647da5d0e46660a314ead9c2fdd9a883aabc32e481a8733"
+dependencies = [
+ "instant",
+ "lock_api 0.4.1",
+ "parking_lot_core 0.8.0",
+]
+
 [[package]]
 name = "parking_lot_core"
 version = "0.6.2"
@@ -1089,11 +1149,26 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b876b1b9e7ac6e1a74a6da34d25c42e17e8862aa409cbbbdcfc8d86c6f3bc62b"
 dependencies = [
  "cfg-if",
- "cloudabi",
+ "cloudabi 0.0.3",
  "libc",
  "redox_syscall",
  "rustc_version 0.2.3",
- "smallvec",
+ "smallvec 0.6.13",
+ "winapi 0.3.8",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c361aa727dd08437f2f1447be8b59a33b0edd15e0fcee698f935613d9efbca9b"
+dependencies = [
+ "cfg-if",
+ "cloudabi 0.1.0",
+ "instant",
+ "libc",
+ "redox_syscall",
+ "smallvec 1.4.2",
  "winapi 0.3.8",
 ]
 
@@ -1370,7 +1445,7 @@ dependencies = [
  "serde_derive",
  "serde_json",
  "simple_logger",
- "tokio 0.2.21",
+ "tokio 0.3.0",
 ]
 
 [[package]]
@@ -1417,7 +1492,7 @@ dependencies = [
  "serde",
  "serde_json",
  "sha2",
- "tokio 0.2.20",
+ "tokio 0.2.22",
  "xml-rs",
 ]
 
@@ -1446,7 +1521,7 @@ dependencies = [
  "serde",
  "serde_json",
  "sha2",
- "tokio 0.2.21",
+ "tokio 0.2.22",
  "xml-rs",
 ]
 
@@ -1466,7 +1541,7 @@ dependencies = [
  "serde",
  "serde_json",
  "shlex",
- "tokio 0.2.21",
+ "tokio 0.2.22",
  "zeroize",
 ]
 
@@ -1486,7 +1561,7 @@ dependencies = [
  "serde",
  "serde_json",
  "shlex",
- "tokio 0.2.20",
+ "tokio 0.2.22",
  "zeroize",
 ]
 
@@ -1526,7 +1601,7 @@ dependencies = [
  "serde",
  "sha2",
  "time 0.2.14",
- "tokio 0.2.20",
+ "tokio 0.2.22",
 ]
 
 [[package]]
@@ -1551,7 +1626,7 @@ dependencies = [
  "serde",
  "sha2",
  "time 0.2.14",
- "tokio 0.2.21",
+ "tokio 0.2.22",
 ]
 
 [[package]]
@@ -1758,6 +1833,12 @@ dependencies = [
  "maybe-uninit",
 ]
 
+[[package]]
+name = "smallvec"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fbee7696b84bbf3d89a1c2eccff0850e3047ed46bfcd2e92c29a2d074d57e252"
+
 [[package]]
 name = "socket2"
 version = "0.3.12"
@@ -1976,7 +2057,7 @@ checksum = "5a09c0b5bb588872ab2f09afa13ee6e9dac11e10a0ec9e8e3ba39a5a5d530af6"
 dependencies = [
  "bytes 0.4.12",
  "futures 0.1.29",
- "mio",
+ "mio 0.6.21",
  "num_cpus",
  "tokio-codec",
  "tokio-current-thread",
@@ -1994,9 +2075,9 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "0.2.21"
+version = "0.2.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d099fa27b9702bed751524694adbe393e18b36b204da91eb1cbbbbb4a5ee2d58"
+checksum = "5d34ca54d84bf2b5b4d7d31e901a8464f7b60ac145a284fba25ceb801f2ddccd"
 dependencies = [
  "bytes 0.5.4",
  "fnv",
@@ -2005,14 +2086,36 @@ dependencies = [
  "lazy_static",
  "libc",
  "memchr",
- "mio",
+ "mio 0.6.21",
  "mio-named-pipes",
  "mio-uds",
  "num_cpus",
  "pin-project-lite",
  "signal-hook-registry",
  "slab",
- "tokio-macros",
+ "tokio-macros 0.2.5",
+ "winapi 0.3.8",
+]
+
+[[package]]
+name = "tokio"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7137dbb0abee577362ccdc7df21605cfcbb949243aeab47dac9ea6ef7d830e21"
+dependencies = [
+ "bytes 0.5.4",
+ "fnv",
+ "futures-core",
+ "lazy_static",
+ "libc",
+ "memchr",
+ "mio 0.7.3",
+ "num_cpus",
+ "parking_lot 0.11.0",
+ "pin-project-lite",
+ "signal-hook-registry",
+ "slab",
+ "tokio-macros 0.3.0",
  "winapi 0.3.8",
 ]
 
@@ -2091,6 +2194,17 @@ dependencies = [
  "syn 1.0.18",
 ]
 
+[[package]]
+name = "tokio-macros"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d48caa7b66c7a6ec943edf78d21a594fbeb24e536c781da67d5c32edec54103f"
+dependencies = [
+ "proc-macro2 1.0.10",
+ "quote 1.0.3",
+ "syn 1.0.18",
+]
+
 [[package]]
 name = "tokio-reactor"
 version = "0.1.12"
@@ -2101,9 +2215,9 @@ dependencies = [
  "futures 0.1.29",
  "lazy_static",
  "log",
- "mio",
+ "mio 0.6.21",
  "num_cpus",
- "parking_lot",
+ "parking_lot 0.9.0",
  "slab",
  "tokio-executor",
  "tokio-io",
@@ -2129,7 +2243,7 @@ dependencies = [
  "bytes 0.4.12",
  "futures 0.1.29",
  "iovec",
- "mio",
+ "mio 0.6.21",
  "tokio-io",
  "tokio-reactor",
 ]
@@ -2170,7 +2284,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7bde02a3a5291395f59b06ec6945a3077602fac2b07eeeaf0dee2122f3619828"
 dependencies = [
  "native-tls",
- "tokio 0.2.21",
+ "tokio 0.2.22",
 ]
 
 [[package]]
@@ -2182,7 +2296,7 @@ dependencies = [
  "bytes 0.4.12",
  "futures 0.1.29",
  "log",
- "mio",
+ "mio 0.6.21",
  "tokio-codec",
  "tokio-io",
  "tokio-reactor",
@@ -2199,7 +2313,7 @@ dependencies = [
  "iovec",
  "libc",
  "log",
- "mio",
+ "mio 0.6.21",
  "mio-uds",
  "tokio-codec",
  "tokio-io",
@@ -2217,7 +2331,7 @@ dependencies = [
  "futures-sink",
  "log",
  "pin-project-lite",
- "tokio 0.2.21",
+ "tokio 0.2.22",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 110ed48..70659e7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,7 @@ edition = "2018"
 # lambda = { version = "0.2.1", package = "lambda_runtime" }
 lambda = { git = "https://github.com/awslabs/aws-lambda-rust-runtime/", branch = "master" }
 serde_json = "1.0.53"
-tokio = { version = "0.2", features = ["full"] }
+tokio = { version = "0.3", features = ["full"] }
 lambda_runtime_client = "0.2.2"
 serde_derive = "1.0.106"
 serde = "1.0.111"