diff --git a/Cargo.toml b/Cargo.toml
index 4568cf629..5f9d82f4a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "jujutsu"
 version = "0.2.0"
 authors = ["Martin von Zweigbergk <martinvonz@google.com>"]
-edition = "2018"
+edition = "2021"
 license = "Apache-2.0"
 description = "Jujutsu (an experimental VCS)"
 homepage = "https://github.com/martinvonz/jj"
diff --git a/lib/Cargo.toml b/lib/Cargo.toml
index 9e79e91f0..35f776eaa 100644
--- a/lib/Cargo.toml
+++ b/lib/Cargo.toml
@@ -2,7 +2,7 @@
 name = "jujutsu-lib"
 version = "0.2.0"
 authors = ["Martin von Zweigbergk <martinvonz@google.com>"]
-edition = "2018"
+edition = "2021"
 license = "Apache-2.0"
 description = "Library for Jujutsu (an experimental VCS)"
 homepage = "https://github.com/martinvonz/jj"