diff --git a/ascon-aead/Cargo.toml b/ascon-aead/Cargo.toml
index 70b8eebd..ebe1cbe4 100644
--- a/ascon-aead/Cargo.toml
+++ b/ascon-aead/Cargo.toml
@@ -20,7 +20,7 @@ subtle = { version = "2", default-features = false }
 zeroize = { version = "1.6", optional = true, default-features = false, features = [
     "derive",
 ] }
-ascon = "0.3"
+ascon = "0.4"
 
 [dev-dependencies]
 hex = "0.4"
@@ -28,7 +28,7 @@ aead = { version = "0.5", features = ["alloc"] }
 spectral = { version = "0.6", default-features = false }
 
 [features]
-default = ["alloc", "getrandom", "zeroize"]
+default = ["alloc", "getrandom", "zeroize", "sponge-zeroize"]
 std = ["aead/std", "alloc"]
 alloc = ["aead/alloc"]
 arrayvec = ["aead/arrayvec"]
@@ -36,6 +36,7 @@ getrandom = ["aead/getrandom", "rand_core"]
 heapless = ["aead/heapless"]
 rand_core = ["aead/rand_core"]
 stream = ["aead/stream"]
+sponge-zeroize = ["ascon/zeroize"]
 
 [package.metadata.docs.rs]
 all-features = true