diff --git a/Cargo.toml b/Cargo.toml
index 7497155..754f4cd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ repository = "https://github.com/ankane/libmf-rust"
 license = "BSD-3-Clause"
 authors = ["Andrew Kane <andrew@ankane.org>"]
 edition = "2021"
-rust-version = "1.56.0"
+rust-version = "1.63.0"
 readme = "README.md"
 exclude = ["vendor/libmf/demo/*", "vendor/libmf/windows/*"]
 links = "mf"