diff --git a/Cargo.lock b/Cargo.lock
index 989f151..6f84ba4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.10"
@@ -231,7 +233,7 @@ dependencies = [
  "indexmap",
  "log",
  "slab",
- "tokio",
+ "tokio 0.2.24",
  "tokio-util 0.3.1",
 ]
 
@@ -296,7 +298,7 @@ dependencies = [
  "net2",
  "pin-project",
  "time",
- "tokio",
+ "tokio 0.2.24",
  "tower-service",
  "want",
 ]
@@ -503,6 +505,12 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "237844750cfbb86f67afe27eee600dfbbcb6188d734139b534cbfbf4f96792ae"
 
+[[package]]
+name = "pin-project-lite"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e0a7ae3ac2f1173085d398531c705756c94a4c56843785df85a60c1a0afac116"
+
 [[package]]
 name = "pin-utils"
 version = "0.1.0-alpha.4"
@@ -546,11 +554,11 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.10"
+version = "1.0.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df246d292ff63439fea9bc8c0a270bed0e390d5ebd4db4ba15aba81111b5abe3"
+checksum = "c54b25569025b7fc9651de43004ae593a75ad88543b17178aa5e1b9c4f15f56f"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -742,13 +750,13 @@ checksum = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
 
 [[package]]
 name = "syn"
-version = "1.0.17"
+version = "1.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0df0eb663f387145cab623dea85b09c2c5b4b0aef44e945d928e682fce71bb03"
+checksum = "0748dd251e24453cb8717f0354206b91557e4ec8703673a4b30208f2abaf1ebf"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -787,9 +795,9 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "0.2.16"
+version = "0.2.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee5a0dd887e37d37390c13ff8ac830f992307fe30a1fff0ab8427af67211ba28"
+checksum = "099837d3464c16a808060bb3f02263b412f6fafcb5d01c533d309985fbeebe48"
 dependencies = [
  "bytes",
  "fnv",
@@ -798,16 +806,26 @@ dependencies = [
  "lazy_static",
  "memchr",
  "mio",
- "pin-project-lite",
+ "pin-project-lite 0.1.4",
  "slab",
+]
+
+[[package]]
+name = "tokio"
+version = "1.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50dae83881bc9b0403dd5b44ea9deed3e939856cc8722d5be37f0d6e5c6d53dd"
+dependencies = [
+ "autocfg",
+ "pin-project-lite 0.2.9",
  "tokio-macros",
 ]
 
 [[package]]
 name = "tokio-macros"
-version = "0.2.5"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0c3acc6aa564495a0f2e1d59fab677cd7f81a19994cfc7f3ad0e64301560389"
+checksum = "9724f9a975fb987ef7a3cd9be0350edcbe130698af5b8f7a631e23d42d052484"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -824,8 +842,8 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "log",
- "pin-project-lite",
- "tokio",
+ "pin-project-lite 0.1.4",
+ "tokio 0.2.24",
 ]
 
 [[package]]
@@ -838,8 +856,8 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "log",
- "pin-project-lite",
- "tokio",
+ "pin-project-lite 0.1.4",
+ "tokio 0.2.24",
 ]
 
 [[package]]
@@ -861,7 +879,7 @@ dependencies = [
  "pin-project",
  "prost",
  "prost-derive",
- "tokio",
+ "tokio 0.2.24",
  "tokio-util 0.2.0",
  "tower",
  "tower-balance",
@@ -914,7 +932,7 @@ dependencies = [
  "pin-project",
  "rand",
  "slab",
- "tokio",
+ "tokio 0.2.24",
  "tower-discover",
  "tower-layer",
  "tower-load",
@@ -932,7 +950,7 @@ checksum = "c4887dc2a65d464c8b9b66e0e4d51c2fd6cf5b3373afc72805b0a60bce00446a"
 dependencies = [
  "futures-core",
  "pin-project",
- "tokio",
+ "tokio 0.2.24",
  "tower-layer",
  "tower-service",
  "tracing",
@@ -963,7 +981,7 @@ checksum = "92c3040c5dbed68abffaa0d4517ac1a454cd741044f33ab0eefab6b8d1361404"
 dependencies = [
  "futures-core",
  "pin-project",
- "tokio",
+ "tokio 0.2.24",
  "tower-layer",
  "tower-load",
  "tower-service",
@@ -978,7 +996,7 @@ dependencies = [
  "futures-core",
  "log",
  "pin-project",
- "tokio",
+ "tokio 0.2.24",
  "tower-discover",
  "tower-service",
 ]
@@ -1001,7 +1019,7 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ce50370d644a0364bf4877ffd4f76404156a248d104e2cc234cd391ea5cdc965"
 dependencies = [
- "tokio",
+ "tokio 0.2.24",
  "tower-service",
 ]
 
@@ -1015,7 +1033,7 @@ dependencies = [
  "futures-util",
  "indexmap",
  "log",
- "tokio",
+ "tokio 0.2.24",
  "tower-service",
 ]
 
@@ -1027,7 +1045,7 @@ checksum = "e6727956aaa2f8957d4d9232b308fe8e4e65d99db30f42b225646e86c9b6a952"
 dependencies = [
  "futures-core",
  "pin-project",
- "tokio",
+ "tokio 0.2.24",
  "tower-layer",
  "tower-service",
 ]
@@ -1045,7 +1063,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "127b8924b357be938823eaaec0608c482d40add25609481027b96198b2e4b31e"
 dependencies = [
  "pin-project",
- "tokio",
+ "tokio 0.2.24",
  "tower-layer",
  "tower-service",
 ]
@@ -1116,16 +1134,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e604eb7b43c06650e854be16a2a03155743d3752dd1c943f6829e26b7a36e382"
 
 [[package]]
-name = "unicode-segmentation"
-version = "1.6.0"
+name = "unicode-ident"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0"
+checksum = "d22af068fba1eb5edcb4aea19d382b2a3deb4c8f9d475c589b6ada9e0fd493ee"
 
 [[package]]
-name = "unicode-xid"
-version = "0.2.0"
+name = "unicode-segmentation"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+checksum = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0"
 
 [[package]]
 name = "want"
@@ -1207,7 +1225,7 @@ dependencies = [
  "prost",
  "serde",
  "serde_json",
- "tokio",
+ "tokio 1.8.4",
  "tonic",
  "tonic-build",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 55149bf..ebd8392 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,7 +19,7 @@ serde = { version = "1.0.105", features = ["derive"] }
 serde_json = "1.0.48"
 hex = "0.4.2"
 tonic = "0.1.1"
-tokio = { version = "0.2", features = ["macros"] }
+tokio = { version = "1.8", features = ["macros"] }
 prost = "0.6.1"
 
 [dev-dependencies]