diff --git a/Cargo.toml b/Cargo.toml
index 4d5efaf..3bc7e2f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ homepage = "https://github.com/zcash/zip32"
 repository = "https://github.com/zcash/zip32"
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.65"
+rust-version = "1.60"
 
 [dependencies]
 blake2b_simd = "1"
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index ce69938..47fd09e 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.65.0"
+channel = "1.60.0"
 components = ["clippy", "rustfmt"]