diff --git a/.github/workflows/cc.yml b/.github/workflows/cc.yml
index e3edb80..56b0915 100644
--- a/.github/workflows/cc.yml
+++ b/.github/workflows/cc.yml
@@ -36,9 +36,7 @@ jobs:
         override: true
 
     - name: Run unittest
-      # Disable --all-features to avoid CI failure when download dependent lib (via yarn) for contract compilation.
-      # run: cargo test --all-features --no-fail-fast
-      run: cargo test --no-fail-fast
+      run: cargo test --all-features --no-fail-fast
       env:
         CARGO_INCREMENTAL: '0'
         RUSTC_BOOTSTRAP: '1'
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 0de5ec5..792c2c1 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -96,4 +96,5 @@ jobs:
       - name: Run cargo clippy
         uses: actions-rs/cargo@v1
         with:
-          command: clippy
\ No newline at end of file
+          command: clippy
+          args: -- -D warnings
\ No newline at end of file
diff --git a/common/contract-interface/build.rs b/common/contract-interface/build.rs
index 0d405ff..93043a6 100644
--- a/common/contract-interface/build.rs
+++ b/common/contract-interface/build.rs
@@ -1,30 +1,30 @@
-use std::process::Command;
+// use std::process::Command;
 
-const INSTALL_ERROR_MESSAGE: &str =
-    "Install dependencies for contract fail, try to run `yarn` in folder 'zerog-storage-contracts'";
-const COMPILE_ERROR_MESSAGE: &str =
-    "Compile solidity contracts fail, try to run `yarn compile` in folder 'zerog-storage-contracts'";
+// const INSTALL_ERROR_MESSAGE: &str =
+//     "Install dependencies for contract fail, try to run `yarn` in folder 'zerog-storage-contracts'";
+// const COMPILE_ERROR_MESSAGE: &str =
+//     "Compile solidity contracts fail, try to run `yarn compile` in folder 'zerog-storage-contracts'";
 
 fn main() {
-    if cfg!(feature = "compile-contracts") {
-        println!("cargo:rerun-if-changed=../../zerog-storage-contracts/contracts/");
-        println!("cargo:rerun-if-changed=../../zerog-storage-contracts/hardhat.config.ts");
+    //     if cfg!(feature = "compile-contracts") {
+    //         println!("cargo:rerun-if-changed=../../zerog-storage-contracts/contracts/");
+    //         println!("cargo:rerun-if-changed=../../zerog-storage-contracts/hardhat.config.ts");
 
-        let output = Command::new("yarn")
-            .arg("--cwd")
-            .arg("../../zerog-storage-contracts")
-            .status()
-            .expect(INSTALL_ERROR_MESSAGE);
-        assert!(output.success(), "{}", INSTALL_ERROR_MESSAGE);
+    //         let output = Command::new("yarn")
+    //             .arg("--cwd")
+    //             .arg("../../zerog-storage-contracts")
+    //             .status()
+    //             .expect(INSTALL_ERROR_MESSAGE);
+    //         assert!(output.success(), "{}", INSTALL_ERROR_MESSAGE);
 
-        let output = Command::new("yarn")
-            .arg("--cwd")
-            .arg("../../zerog-storage-contracts")
-            .arg("compile")
-            .status()
-            .expect(COMPILE_ERROR_MESSAGE);
-        assert!(output.success(), "{}", COMPILE_ERROR_MESSAGE);
-    } else {
-        println!("cargo:rerun-if-changed=../../zerog-storage-contracts/artifacts/");
-    }
+    //         let output = Command::new("yarn")
+    //             .arg("--cwd")
+    //             .arg("../../zerog-storage-contracts")
+    //             .arg("compile")
+    //             .status()
+    //             .expect(COMPILE_ERROR_MESSAGE);
+    //         assert!(output.success(), "{}", COMPILE_ERROR_MESSAGE);
+    //     } else {
+    //         println!("cargo:rerun-if-changed=../../zerog-storage-contracts/artifacts/");
+    //     }
 }
diff --git a/node/network/src/discovery/enr.rs b/node/network/src/discovery/enr.rs
index 1e661c3..a9dfde7 100644
--- a/node/network/src/discovery/enr.rs
+++ b/node/network/src/discovery/enr.rs
@@ -1,6 +1,6 @@
 //! Helper functions and an extension trait for Ethereum 2 ENRs.
 
-pub use discv5::enr::{self, CombinedKey, EnrBuilder};
+pub use discv5::enr::{CombinedKey, EnrBuilder};
 
 use super::enr_ext::CombinedKeyExt;
 use super::ENR_FILENAME;
diff --git a/node/router/src/libp2p_event_handler.rs b/node/router/src/libp2p_event_handler.rs
index 3f71ba3..bbd5347 100644
--- a/node/router/src/libp2p_event_handler.rs
+++ b/node/router/src/libp2p_event_handler.rs
@@ -24,7 +24,7 @@ lazy_static::lazy_static! {
 }
 
 fn duration_since(timestamp: u32) -> chrono::Duration {
-    let timestamp = i64::try_from(timestamp).expect("Should fit");
+    let timestamp = i64::from(timestamp);
     let timestamp = chrono::NaiveDateTime::from_timestamp_opt(timestamp, 0).expect("should fit");
     let now = chrono::Utc::now().naive_utc();
     now.signed_duration_since(timestamp)
diff --git a/node/src/client/mod.rs b/node/src/client/mod.rs
index 4074b04..3f9892a 100644
--- a/node/src/client/mod.rs
+++ b/node/src/client/mod.rs
@@ -7,7 +7,7 @@ use network::{Enr, Multiaddr, NetworkGlobals};
 use std::sync::Arc;
 
 pub use builder::ClientBuilder;
-pub use environment::{Environment, EnvironmentBuilder, RuntimeContext};
+pub use environment::{EnvironmentBuilder, RuntimeContext};
 
 /// The core Zgs client.
 ///
diff --git a/rust-toolchain b/rust-toolchain
index 5e3a425..7c7053a 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-1.73.0
+1.75.0
diff --git a/rustlint.sh b/rustlint.sh
new file mode 100644
index 0000000..e380d29
--- /dev/null
+++ b/rustlint.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+# keep consistent with CI-lint in rust.yml
+cargo fmt --all
+cargo clippy -- -D warnings
diff --git a/version-meld/discv5/src/kbucket/entry.rs b/version-meld/discv5/src/kbucket/entry.rs
index e978613..0dfc739 100644
--- a/version-meld/discv5/src/kbucket/entry.rs
+++ b/version-meld/discv5/src/kbucket/entry.rs
@@ -26,7 +26,7 @@
 
 pub use super::{
     bucket::{
-        AppliedPending, ConnectionState, InsertResult, Node, NodeStatus, MAX_NODES_PER_BUCKET,
+        AppliedPending, ConnectionState, InsertResult, Node, NodeStatus,
     },
     key::*,
     ConnectionDirection,