diff --git a/reverie-examples/Cargo.toml b/reverie-examples/Cargo.toml
index 0855e46..12ce2ee 100644
--- a/reverie-examples/Cargo.toml
+++ b/reverie-examples/Cargo.toml
@@ -57,5 +57,5 @@ reverie-ptrace = { version = "0.1.0", path = "../reverie-ptrace" }
 reverie-util = { version = "0.1.0", path = "../reverie-util" }
 serde = { version = "1.0.136", features = ["derive", "rc"] }
 serde_json = { version = "1.0.79", features = ["float_roundtrip", "unbounded_depth"] }
-tokio = { version = "1.15", features = ["full", "test-util", "tracing"] }
+tokio = { version = "1.21.2", features = ["full", "test-util", "tracing"] }
 tracing = "0.1.35"
diff --git a/reverie-process/Cargo.toml b/reverie-process/Cargo.toml
index f94157b..b84cb5b 100644
--- a/reverie-process/Cargo.toml
+++ b/reverie-process/Cargo.toml
@@ -17,7 +17,7 @@ nix = "0.25"
 serde = { version = "1.0.136", features = ["derive", "rc"] }
 syscalls = { version = "0.6.7", features = ["serde"] }
 thiserror = "1.0.36"
-tokio = { version = "1.15", features = ["full", "test-util", "tracing"] }
+tokio = { version = "1.21.2", features = ["full", "test-util", "tracing"] }
 
 [dev-dependencies]
 const-cstr = "0.3.0"
diff --git a/reverie-ptrace/Cargo.toml b/reverie-ptrace/Cargo.toml
index 40a44e6..3143db8 100644
--- a/reverie-ptrace/Cargo.toml
+++ b/reverie-ptrace/Cargo.toml
@@ -26,7 +26,7 @@ reverie = { version = "0.1.0", path = "../reverie" }
 safeptrace = { version = "0.1.0", path = "../safeptrace" }
 serde = { version = "1.0.136", features = ["derive", "rc"] }
 thiserror = "1.0.36"
-tokio = { version = "1.15", features = ["full", "test-util", "tracing"] }
+tokio = { version = "1.21.2", features = ["full", "test-util", "tracing"] }
 tokio-stream = { version = "0.1.4", features = ["fs", "io-util", "net", "signal", "sync", "time"] }
 tracing = "0.1.35"
 tracing-subscriber = { version = "0.3.16", features = ["ansi", "env-filter", "fmt", "json", "local-time", "parking_lot", "registry"] }
diff --git a/safeptrace/Cargo.toml b/safeptrace/Cargo.toml
index 2b809c5..6beda02 100644
--- a/safeptrace/Cargo.toml
+++ b/safeptrace/Cargo.toml
@@ -22,4 +22,4 @@ thiserror = "1.0.36"
 [dev-dependencies]
 quickcheck = "1.0"
 quickcheck_macros = "1.0"
-tokio = { version = "1.15", features = ["full", "test-util", "tracing"] }
+tokio = { version = "1.21.2", features = ["full", "test-util", "tracing"] }