diff --git a/src/tools/miri/test_dependencies/Cargo.lock b/src/tools/miri/test_dependencies/Cargo.lock
index d4b32e2c29a22..52240a3a091e5 100644
--- a/src/tools/miri/test_dependencies/Cargo.lock
+++ b/src/tools/miri/test_dependencies/Cargo.lock
@@ -123,12 +123,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "once_cell"
-version = "1.13.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18a6dbe30758c9f83eb00cbea4ac95966305f5a7772f3f42ebfc7fc7eddbd8e1"
-
 [[package]]
 name = "page_size"
 version = "0.4.2"
@@ -275,16 +269,16 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "1.19.2"
+version = "1.20.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c51a52ed6686dd62c320f9b89299e9dfb46f730c7a48e635c19f21d116cb1439"
+checksum = "eb78f30e4b41e98ca4cce5acb51168a033839a7af9e42b380355808e14e98ee0"
 dependencies = [
+ "autocfg",
  "bytes",
  "libc",
  "memchr",
  "mio",
  "num_cpus",
- "once_cell",
  "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",
diff --git a/src/tools/miri/test_dependencies/Cargo.toml b/src/tools/miri/test_dependencies/Cargo.toml
index 58f731f91d0f4..ae7907bd661f1 100644
--- a/src/tools/miri/test_dependencies/Cargo.toml
+++ b/src/tools/miri/test_dependencies/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2021"
 
 [dependencies]
 # all dependencies (and their transitive ones) listed here can be used in `tests/`.
-tokio = { version = "1.0", features = ["full"] }
+tokio = { version = "1.20", features = ["full"] }
 libc = "0.2"
 page_size = "0.4.1"
 num_cpus = "1.10.1"