diff --git a/example-service/Cargo.toml b/example-service/Cargo.toml
index e8b735f..667bf7a 100644
--- a/example-service/Cargo.toml
+++ b/example-service/Cargo.toml
@@ -2,7 +2,7 @@
 name = "tarpc-example-service"
 version = "0.10.0"
 authors = ["Tim Kuehn <tikue@google.com>"]
-edition = "2018"
+edition = "2021"
 license = "MIT"
 documentation = "https://docs.rs/tarpc-example-service"
 homepage = "https://github.com/google/tarpc"
diff --git a/plugins/Cargo.toml b/plugins/Cargo.toml
index 23a4bb5..249ac04 100644
--- a/plugins/Cargo.toml
+++ b/plugins/Cargo.toml
@@ -2,7 +2,7 @@
 name = "tarpc-plugins"
 version = "0.12.0"
 authors = ["Adam Wright <adam.austin.wright@gmail.com>", "Tim Kuehn <timothy.j.kuehn@gmail.com>"]
-edition = "2018"
+edition = "2021"
 license = "MIT"
 documentation = "https://docs.rs/tarpc-plugins"
 homepage = "https://github.com/google/tarpc"
diff --git a/tarpc/Cargo.toml b/tarpc/Cargo.toml
index 6655636..bab5593 100644
--- a/tarpc/Cargo.toml
+++ b/tarpc/Cargo.toml
@@ -2,7 +2,7 @@
 name = "tarpc"
 version = "0.27.2"
 authors = ["Adam Wright <adam.austin.wright@gmail.com>", "Tim Kuehn <timothy.j.kuehn@gmail.com>"]
-edition = "2018"
+edition = "2021"
 license = "MIT"
 documentation = "https://docs.rs/tarpc"
 homepage = "https://github.com/google/tarpc"