diff --git a/Cargo.toml b/Cargo.toml
index 51b81c6b3..aba0a6573 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,7 @@ name = "jujutsu"
 version = "0.4.0"
 authors = ["Martin von Zweigbergk <martinvonz@google.com>"]
 edition = "2021"
+rust-version = "1.58"
 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 c23a4fa88..07ce556fa 100644
--- a/lib/Cargo.toml
+++ b/lib/Cargo.toml
@@ -3,6 +3,7 @@ name = "jujutsu-lib"
 version = "0.4.0"
 authors = ["Martin von Zweigbergk <martinvonz@google.com>"]
 edition = "2021"
+rust-version = "1.57"
 license = "Apache-2.0"
 description = "Library for Jujutsu (an experimental VCS)"
 homepage = "https://github.com/martinvonz/jj"