diff --git a/futures-channel/Cargo.toml b/futures-channel/Cargo.toml
index 9808d661c..e6c67cf64 100644
--- a/futures-channel/Cargo.toml
+++ b/futures-channel/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "futures-channel"
 version = "0.4.0-alpha.0"
-edition = "2018"
+edition = "2021"
 rust-version = "1.56"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/futures-rs"
diff --git a/futures-executor/Cargo.toml b/futures-executor/Cargo.toml
index 8e142e9b9..ac8c78cfa 100644
--- a/futures-executor/Cargo.toml
+++ b/futures-executor/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "futures-executor"
 version = "0.4.0-alpha.0"
-edition = "2018"
+edition = "2021"
 rust-version = "1.56"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/futures-rs"
diff --git a/futures-macro/Cargo.toml b/futures-macro/Cargo.toml
index c6fe91cd1..2346d183f 100644
--- a/futures-macro/Cargo.toml
+++ b/futures-macro/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "futures-macro"
 version = "0.4.0-alpha.0"
-edition = "2018"
+edition = "2021"
 rust-version = "1.56"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/futures-rs"
diff --git a/futures-task/Cargo.toml b/futures-task/Cargo.toml
index 7dbf85fad..949384f89 100644
--- a/futures-task/Cargo.toml
+++ b/futures-task/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "futures-task"
 version = "0.4.0-alpha.0"
-edition = "2018"
+edition = "2021"
 rust-version = "1.56"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/futures-rs"
diff --git a/futures-test/Cargo.toml b/futures-test/Cargo.toml
index 4dce6e615..833514f82 100644
--- a/futures-test/Cargo.toml
+++ b/futures-test/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "futures-test"
 version = "0.4.0-alpha.0"
-edition = "2018"
+edition = "2021"
 rust-version = "1.56"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/futures-rs"
diff --git a/futures-util/Cargo.toml b/futures-util/Cargo.toml
index 0fbd3d090..3a2f8db9b 100644
--- a/futures-util/Cargo.toml
+++ b/futures-util/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "futures-util"
 version = "0.4.0-alpha.0"
-edition = "2018"
+edition = "2021"
 rust-version = "1.56"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/futures-rs"
diff --git a/futures/Cargo.toml b/futures/Cargo.toml
index d709a80ad..8636e734d 100644
--- a/futures/Cargo.toml
+++ b/futures/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "futures"
 version = "0.4.0-alpha.0"
-edition = "2018"
+edition = "2021"
 rust-version = "1.56"
 license = "MIT OR Apache-2.0"
 readme = "../README.md"