diff --git a/crates/ibc/Cargo.toml b/crates/ibc/Cargo.toml
index 8b93e39..5baf155 100644
--- a/crates/ibc/Cargo.toml
+++ b/crates/ibc/Cargo.toml
@@ -16,10 +16,10 @@ ssz-rs = { git = "https://github.com/bluele/ssz_rs", branch = "serde-no-std", de
 hex = { version = "0.4.3", default-features = false }
 
 ethereum-ibc-proto = { path = "../../proto", default-features = false }
-ethereum-consensus = { git = "https://github.com/datachainlab/ethereum-light-client-rs", rev = "v0.1.7", default-features = false }
-ethereum-light-client-verifier = { git = "https://github.com/datachainlab/ethereum-light-client-rs", rev = "v0.1.7", default-features = false }
+ethereum-consensus = { git = "https://github.com/datachainlab/ethereum-light-client-rs", rev = "v0.2.0", default-features = false }
+ethereum-light-client-verifier = { git = "https://github.com/datachainlab/ethereum-light-client-rs", rev = "v0.2.0", default-features = false }
 
 [dev-dependencies]
 time = { version = "0.3", default-features = false, features = ["macros", "parsing"] }
 hex-literal = "0.4.1"
-ethereum-light-client-verifier = { git = "https://github.com/datachainlab/ethereum-light-client-rs", rev = "v0.1.7", default-features = false, features = ["test-utils"] }
+ethereum-light-client-verifier = { git = "https://github.com/datachainlab/ethereum-light-client-rs", rev = "v0.2.0", default-features = false, features = ["test-utils"] }
diff --git a/crates/ibc/src/client_state.rs b/crates/ibc/src/client_state.rs
index 1967107..9f10da2 100644
--- a/crates/ibc/src/client_state.rs
+++ b/crates/ibc/src/client_state.rs
@@ -813,7 +813,8 @@ impl<const SYNC_COMMITTEE_SIZE: usize> TryFrom<RawClientState>
             epochs_per_sync_committee_period: value.epochs_per_sync_committee_period.into(),
             ibc_address: value.ibc_address.as_slice().try_into()?,
             ibc_commitments_slot: H256::from_slice(&value.ibc_commitments_slot),
-            trust_level: Fraction::new(trust_level.numerator, trust_level.denominator),
+            trust_level: Fraction::new(trust_level.numerator, trust_level.denominator)
+                .map_err(Error::VerificationError)?,
             trusting_period: value
                 .trusting_period
                 .ok_or(Error::MissingTrustingPeriod)?
@@ -879,8 +880,8 @@ impl<const SYNC_COMMITTEE_SIZE: usize> From<ClientState<SYNC_COMMITTEE_SIZE>> fo
             ibc_address: value.ibc_address.0.to_vec(),
             ibc_commitments_slot: value.ibc_commitments_slot.as_bytes().to_vec(),
             trust_level: Some(ProtoFraction {
-                numerator: value.trust_level.numerator,
-                denominator: value.trust_level.denominator,
+                numerator: value.trust_level.numerator(),
+                denominator: value.trust_level.denominator(),
             }),
             trusting_period: Some(value.trusting_period.into()),
             max_clock_drift: Some(value.max_clock_drift.into()),
@@ -1059,7 +1060,7 @@ mod tests {
                 epochs_per_sync_committee_period: PRESET.EPOCHS_PER_SYNC_COMMITTEE_PERIOD,
                 ibc_address: Address(hex!("ff77D90D6aA12db33d3Ba50A34fB25401f6e4c4F")),
                 ibc_commitments_slot: keccak256("ibc_commitments_slot"),
-                trust_level: Fraction::new(2, 3),
+                trust_level: Fraction::new(2, 3).unwrap(),
                 trusting_period: Duration::from_secs(60 * 60 * 27),
                 max_clock_drift: Duration::from_secs(60),
                 latest_execution_block_number: 1.into(),
diff --git a/crates/ibc/src/consensus_state.rs b/crates/ibc/src/consensus_state.rs
index 08162d9..bd8af2b 100644
--- a/crates/ibc/src/consensus_state.rs
+++ b/crates/ibc/src/consensus_state.rs
@@ -53,6 +53,10 @@ impl ConsensusState {
             Err(Error::UninitializedConsensusStateField(
                 "current_sync_committee",
             ))
+        } else if self.next_sync_committee == PublicKey::default() {
+            Err(Error::UninitializedConsensusStateField(
+                "next_sync_committee",
+            ))
         } else {
             Ok(())
         }
diff --git a/crates/ibc/src/header.rs b/crates/ibc/src/header.rs
index 45f1a7d..7042853 100644
--- a/crates/ibc/src/header.rs
+++ b/crates/ibc/src/header.rs
@@ -224,7 +224,7 @@ mod tests {
             config::minimal::get_config(),
             Default::default(),
             Default::default(),
-            Fraction::new(2, 3),
+            Fraction::new(2, 3).unwrap(),
             SystemTime::now()
                 .duration_since(SystemTime::UNIX_EPOCH)
                 .unwrap()
diff --git a/crates/ibc/src/misbehaviour.rs b/crates/ibc/src/misbehaviour.rs
index c12c6e2..a29fe78 100644
--- a/crates/ibc/src/misbehaviour.rs
+++ b/crates/ibc/src/misbehaviour.rs
@@ -229,7 +229,7 @@ mod tests {
             config::minimal::get_config(),
             Default::default(),
             Default::default(),
-            Fraction::new(2, 3),
+            Fraction::new(2, 3).unwrap(),
             SystemTime::now()
                 .duration_since(SystemTime::UNIX_EPOCH)
                 .unwrap()
diff --git a/crates/ibc/src/update.rs b/crates/ibc/src/update.rs
index 8c4dde9..b59fa01 100644
--- a/crates/ibc/src/update.rs
+++ b/crates/ibc/src/update.rs
@@ -110,7 +110,7 @@ mod tests {
             config::minimal::get_config(),
             Default::default(),
             Default::default(),
-            Fraction::new(2, 3),
+            Fraction::new(2, 3).unwrap(),
             SystemTime::now()
                 .duration_since(SystemTime::UNIX_EPOCH)
                 .unwrap()
@@ -149,7 +149,7 @@ mod tests {
                 epochs_per_sync_committee_period: PRESET.EPOCHS_PER_SYNC_COMMITTEE_PERIOD,
                 ibc_address: Address(hex!("ff77D90D6aA12db33d3Ba50A34fB25401f6e4c4F")),
                 ibc_commitments_slot: keccak256("ibc_commitments_slot"),
-                trust_level: Fraction::new(2, 3),
+                trust_level: Fraction::new(2, 3).unwrap(),
                 trusting_period: Duration::from_secs(60 * 60 * 27),
                 max_clock_drift: Duration::from_secs(60),
                 latest_execution_block_number: 1.into(),