diff --git a/CHANGELOG.md b/CHANGELOG.md
index e806d20..9cddeab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 Entries are listed in reverse chronological order.
 
+# 0.6.0
+
+* Use 0.4 series of Arkworks dependencies.
+
 # 0.5.0
 
 * Add `Ord`, `PartialOrd` to `VerificationKey`, `VerificationKeyBytes` so they can be used with BTrees.
diff --git a/Cargo.toml b/Cargo.toml
index 797f01a..281883b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "decaf377-rdsa"
 edition = "2018"
-version = "0.5.0"
+version = "0.6.0"
 authors = ["Penumbra Labs <team@penumbralabs.xyz>"]
 readme = "README.md"
 license = "MIT OR Apache-2.0"
@@ -11,13 +11,13 @@ repository = "https://github.com/penumbra-zone/decaf377-rdsa"
 [dependencies]
 blake2b_simd = "0.5"
 byteorder = "1.3"
-decaf377 = { version= "0.3", default-features=false }
+decaf377 = { version= "0.4", default-features=false }
 digest = "0.9"
 rand_core = "0.6"
 serde = { version = "1", optional = true, features = ["derive"] }
 thiserror = "1.0"
-ark-serialize = "0.3"
-ark-ff =  { version = "0.3", default-features=false }
+ark-serialize = "0.4"
+ark-ff =  { version = "0.4", default-features=false }
 hex = "0.4"
 
 [dev-dependencies]
diff --git a/src/signing_key.rs b/src/signing_key.rs
index 62e8b6e..cdb84fb 100644
--- a/src/signing_key.rs
+++ b/src/signing_key.rs
@@ -68,7 +68,7 @@ impl<D: Domain> TryFrom<[u8; 32]> for SigningKey<D> {
 
     fn try_from(bytes: [u8; 32]) -> Result<Self, Self::Error> {
         use ark_serialize::CanonicalDeserialize;
-        let sk = Fr::deserialize(&bytes[..]).map_err(|_| Error::MalformedSigningKey)?;
+        let sk = Fr::deserialize_compressed(&bytes[..]).map_err(|_| Error::MalformedSigningKey)?;
         Ok(Self::new_from_field(sk))
     }
 }