diff --git a/Cargo.lock b/Cargo.lock
index 9617d534..687c65a9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -470,7 +470,7 @@ dependencies = [
 
 [[package]]
 name = "stellar-xdr"
-version = "0.0.17"
+version = "20.0.0-rc1"
 dependencies = [
  "arbitrary",
  "base64 0.13.0",
diff --git a/Cargo.toml b/Cargo.toml
index 3cb6aca8..cb0a31fe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ homepage = "https://github.com/stellar/rs-stellar-xdr"
 repository = "https://github.com/stellar/rs-stellar-xdr"
 authors = ["Stellar Development Foundation <info@stellar.org>"]
 license = "Apache-2.0"
-version = "0.0.17"
+version = "20.0.0-rc1"
 edition = "2021"
 rust-version = "1.72"