diff --git a/Cargo.lock b/Cargo.lock
index 1d9c2384b2..953473df80 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -760,7 +760,7 @@ name = "chain-vote"
 version = "0.1.0"
 source = "git+https://github.com/input-output-hk/chain-libs.git?branch=master#4876be80441bed5c2796428d6b96739526b016a2"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if 0.1.10",
  "chain-core",
  "chain-crypto",
  "const_format",
@@ -1479,7 +1479,7 @@ dependencies = [
  "thor",
  "tokio",
  "tokio-stream",
- "tokio-util 0.6.10",
+ "tokio-util 0.7.4",
  "tonic 0.4.3",
  "tracing",
  "tracing-appender",
@@ -2405,7 +2405,7 @@ dependencies = [
  "time",
  "tokio",
  "tokio-stream",
- "tokio-util 0.6.10",
+ "tokio-util 0.7.4",
  "tonic 0.6.2",
  "tracing",
  "tracing-appender",
@@ -4943,7 +4943,6 @@ dependencies = [
  "futures-sink",
  "log",
  "pin-project-lite",
- "slab",
  "tokio",
 ]
 
@@ -4957,6 +4956,7 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "pin-project-lite",
+ "slab",
  "tokio",
  "tracing",
 ]
diff --git a/explorer/Cargo.toml b/explorer/Cargo.toml
index 2d42bd26c8..31395f5e59 100644
--- a/explorer/Cargo.toml
+++ b/explorer/Cargo.toml
@@ -30,7 +30,7 @@ tracing-subscriber = { version = "0.3", features = ["fmt", "json"] }
 tracing-appender = "0.2"
 tokio = { version = "^1.4", features = ["rt-multi-thread", "time", "sync", "rt", "signal", "test-util"] }
 tokio-stream = { version = "0.1.4", features = ["sync"] }
-tokio-util = { version = "0.6.0", features = ["time"] }
+tokio-util = { version = "0.7.4", features = ["time"] }
 tonic = "0.4"
 multiaddr = { package = "parity-multiaddr", version = "0.11" }
 rand = "0.8.5"
diff --git a/jormungandr/Cargo.toml b/jormungandr/Cargo.toml
index f31eadb34c..62bee6ba20 100644
--- a/jormungandr/Cargo.toml
+++ b/jormungandr/Cargo.toml
@@ -54,7 +54,7 @@ tracing-subscriber = { version = "0.3", features = ["fmt", "json", "time"] }
 tracing-appender = "0.2"
 tokio = { version = "^1.15", features = ["rt-multi-thread", "time", "sync", "rt", "signal", "test-util"] }
 tokio-stream = { version = "0.1.4", features = ["sync"] }
-tokio-util = { version = "0.6.0", features = ["time"] }
+tokio-util = { version = "0.7.4", features = ["time"] }
 tonic = "0.6"
 lru = "0.7"
 warp = { version = "0.3.2", features = ["tls"] }