diff --git a/jsonrpc/Cargo.toml b/jsonrpc/Cargo.toml
index f63a2e8..249c001 100644
--- a/jsonrpc/Cargo.toml
+++ b/jsonrpc/Cargo.toml
@@ -10,7 +10,7 @@ description = "Rust support for the JSON-RPC 2.0 protocol"
 keywords = [ "protocol", "json", "http", "jsonrpc" ]
 readme	 = "README.md"
 edition = "2021"
-rust-version = "1.56.1"
+rust-version = "1.63.0"
 exclude = ["tests", "contrib"]
 
 [package.metadata.docs.rs]