diff --git a/Cargo.lock b/Cargo.lock
index aef07c84..35562a76 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -51,7 +51,7 @@ dependencies = [
 
 [[package]]
 name = "dbl"
-version = "0.4.0-pre.4"
+version = "0.4.0-rc.0"
 dependencies = [
  "hybrid-array",
 ]
diff --git a/dbl/Cargo.toml b/dbl/Cargo.toml
index 283ff14f..ef2c84be 100644
--- a/dbl/Cargo.toml
+++ b/dbl/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "dbl"
-version = "0.4.0-pre.4"
+version = "0.4.0-rc.0"
 authors = ["RustCrypto Developers"]
 license = "MIT OR Apache-2.0"
 description = "Double operation in Galois Field GF(2^128) as used by e.g. CMAC/PMAC"