diff --git a/tokio-stream/Cargo.toml b/tokio-stream/Cargo.toml
index 6711e29bcec..42f68cda31b 100644
--- a/tokio-stream/Cargo.toml
+++ b/tokio-stream/Cargo.toml
@@ -5,7 +5,7 @@ name = "tokio-stream"
 # - Update CHANGELOG.md.
 # - Create "tokio-stream-0.1.x" git tag.
 version = "0.1.12"
-edition = "2018"
+edition = "2021"
 rust-version = "1.56"
 authors = ["Tokio Contributors <team@tokio.rs>"]
 license = "MIT"
diff --git a/tokio-stream/src/stream_map.rs b/tokio-stream/src/stream_map.rs
index 215980474b1..ddd14d586d6 100644
--- a/tokio-stream/src/stream_map.rs
+++ b/tokio-stream/src/stream_map.rs
@@ -568,7 +568,7 @@ where
     }
 }
 
-impl<K, V> std::iter::FromIterator<(K, V)> for StreamMap<K, V>
+impl<K, V> FromIterator<(K, V)> for StreamMap<K, V>
 where
     K: Hash + Eq,
 {
diff --git a/tokio-test/Cargo.toml b/tokio-test/Cargo.toml
index 603a4b4affc..88cf0ead654 100644
--- a/tokio-test/Cargo.toml
+++ b/tokio-test/Cargo.toml
@@ -5,7 +5,7 @@ name = "tokio-test"
 # - Update CHANGELOG.md.
 # - Create "tokio-test-0.4.x" git tag.
 version = "0.4.2"
-edition = "2018"
+edition = "2021"
 rust-version = "1.56"
 authors = ["Tokio Contributors <team@tokio.rs>"]
 license = "MIT"
diff --git a/tokio-util/Cargo.toml b/tokio-util/Cargo.toml
index cf9f0474051..3f4c60e35ed 100644
--- a/tokio-util/Cargo.toml
+++ b/tokio-util/Cargo.toml
@@ -5,7 +5,7 @@ name = "tokio-util"
 # - Update CHANGELOG.md.
 # - Create "tokio-util-0.7.x" git tag.
 version = "0.7.7"
-edition = "2018"
+edition = "2021"
 rust-version = "1.56"
 authors = ["Tokio Contributors <team@tokio.rs>"]
 license = "MIT"