diff --git a/Cargo.lock b/Cargo.lock
index 8667880..f049445 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -748,7 +748,7 @@ dependencies = [
 
 [[package]]
 name = "zkac"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "blake2",
  "chacha20poly1305",
diff --git a/Cargo.toml b/Cargo.toml
index d39feae..06ea262 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "zkac"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 description = "Zero-Knowledge Access Control: BBS+ anonymous credentials (BLS12-381) with encrypted transport (X25519/ChaCha20-Poly1305)"
 
diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock
index bc6da3b..9e63907 100644
--- a/fuzz/Cargo.lock
+++ b/fuzz/Cargo.lock
@@ -709,7 +709,7 @@ dependencies = [
 
 [[package]]
 name = "zkac"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "blake2",
  "chacha20poly1305",
diff --git a/pyproject.toml b/pyproject.toml
index a434ba5..abcb15f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "zkac"
-version = "0.3.0"
+version = "0.4.0"
 description = "Zero-Knowledge Access Control: BBS+ anonymous credentials with encrypted transport"
 readme = "README.md"
 requires-python = ">=3.9"