diff --git a/Cargo.toml b/Cargo.toml
index 146a1b64..a5599cdb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "lambda_web_adapter"
-version = "0.9.1"
+version = "1.0.0-rc1"
 authors = [
     "Harold Sun <sunhua@amazon.com>",
     "David Calavera <dcalaver@amazon.com>",