diff --git a/Cargo.toml b/Cargo.toml
index 57fbc25879219..45d19ba9907d8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ keywords = ["libc", "ffi", "bindings", "operating", "system"]
 categories = ["external-ffi-bindings", "no-std", "os"]
 build = "build.rs"
 exclude = ["/ci/*", "/.github/*", "/.cirrus.yml", "/triagebot.toml"]
-rust-version = "1.19"
+rust-version = "1.63"
 description = """
 Raw FFI bindings to platform libraries like libc.
 """