diff --git a/vrf/CHANGELOG.md b/vrf/CHANGELOG.md
index 012b2865c..f9f523801 100644
--- a/vrf/CHANGELOG.md
+++ b/vrf/CHANGELOG.md
@@ -3,6 +3,13 @@
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.2.0](https://github.com/EspressoSystems/jellyfish/compare/0.4.5...jf-vrf-v0.2.0) (2024-10-31)
+
+### Changed
+
+- [#697](https://github.com/EspressoSystems/jellyfish/pull/697): upgrade `jf-signature` dependency to 0.2.0.
+  - Secret keys are not required to be serde Serializable.
+
 ## 0.1.0
 
 - Initial release.
diff --git a/vrf/Cargo.toml b/vrf/Cargo.toml
index 53420505e..7996b5063 100644
--- a/vrf/Cargo.toml
+++ b/vrf/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "jf-vrf"
-version = "0.1.0"
+version = "0.2.0"
 description = "Verifiable random function."
 authors = { workspace = true }
 edition = { workspace = true }
@@ -14,7 +14,7 @@ repository = { workspace = true }
 ark-std = { workspace = true }
 digest = { version = "0.10.1", default-features = false, features = ["alloc"] }
 displaydoc = { workspace = true }
-jf-signature = { version = "0.1.0", git = "https://github.com/EspressoSystems/jellyfish", tag = "0.4.5", default-features = false, features = [ "bls" ] }
+jf-signature = { git = "https://github.com/EspressoSystems/jellyfish", tag = "jf-signature-v0.2.0", default-features = false, features = [ "bls" ] }
 serde = { workspace = true }
 sha2 = { workspace = true }
 zeroize = { version = "1.5", default-features = false }
diff --git a/vrf/src/lib.rs b/vrf/src/lib.rs
index 107b547f9..830bbe9cf 100644
--- a/vrf/src/lib.rs
+++ b/vrf/src/lib.rs
@@ -40,15 +40,7 @@ pub trait Vrf {
         + Eq;
 
     /// VRF secret key.
-    type SecretKey: Debug
-        + Clone
-        + Send
-        + Sync
-        + Zeroize
-        + for<'a> Deserialize<'a>
-        + Serialize
-        + PartialEq
-        + Eq;
+    type SecretKey: Debug + Clone + Send + Sync + Zeroize + PartialEq + Eq;
 
     /// VRF signature.
     type Proof: Debug + Clone + Send + Sync + for<'a> Deserialize<'a> + Serialize + PartialEq + Eq;