diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 5fbe6ea..da95100 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -36,3 +36,17 @@ jobs:
     steps:
         - uses: actions/checkout@v4
         - run: cargo fmt --all -- --check
+
+  verify-bytecode:
+    name: Verify Bytecode
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - run: curl -L https://foundry.paradigm.xyz | bash && foundryup
+    - run: forge build --contracts=contracts
+    - run: mkdir -p bytecode/Erc6492.sol
+    - run: jq -r .bytecode.object out/Erc6492.sol/ValidateSigOffchain.json | xxd -r -p > bytecode/Erc6492.sol/ValidateSigOffchain.bytecode
+    - run: mkdir -p bytecode/Erc1271Mock.sol
+    - run: jq -r .bytecode.object out/Erc1271Mock.sol/Erc1271Mock.json | xxd -r -p > bytecode/Erc1271Mock.sol/Erc1271Mock.bytecode
+    - run: git diff bytecode
+    - run: if [ -n "$(git diff bytecode)" ]; then exit 1; fi
diff --git a/.gitignore b/.gitignore
index ea8c4bf..1e949f5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 /target
+/out
+/cache
diff --git a/Cargo.lock b/Cargo.lock
index 1eec1dd..b1c5608 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1138,9 +1138,7 @@ version = "0.1.0"
 dependencies = [
  "alloy",
  "alloy-node-bindings",
- "alloy-primitives 0.8.0",
  "regex",
- "serde_json",
  "tokio",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index ade7b5f..052f969 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,3 @@ alloy = { version = "0.3", features = ["signer-local"] }
 alloy-node-bindings = { git = "https://github.com/alloy-rs/alloy.git", rev = "d68a6b7" }
 regex = "1"
 tokio = { version = "1", features = ["full"] }
-
-[build-dependencies]
-alloy-primitives = { version = "0.8.0" }
-serde_json = "1"
diff --git a/build.rs b/build.rs
deleted file mode 100644
index 1232c5c..0000000
--- a/build.rs
+++ /dev/null
@@ -1,104 +0,0 @@
-use {
-    serde_json::Value,
-    std::process::{Command, Stdio},
-};
-
-fn main() {
-    build_contracts();
-}
-
-fn build_contracts() {
-    println!("cargo::rerun-if-changed=contracts");
-    install_foundry();
-    compile_contracts();
-    extract_bytecodes();
-}
-
-fn format_foundry_dir(path: &str) -> String {
-    format!(
-        "{}/../../../../.foundry/{}",
-        std::env::var("OUT_DIR").unwrap(),
-        path
-    )
-}
-
-fn install_foundry() {
-    let bin_finished_flag = format_foundry_dir("bin/.finished");
-    if std::fs::metadata(&bin_finished_flag).is_ok() {
-        return;
-    }
-
-    let bin_folder = format_foundry_dir("bin");
-    std::fs::remove_dir_all(&bin_folder).ok();
-    std::fs::create_dir_all(&bin_folder).unwrap();
-    let output = Command::new("bash")
-        .args(["-c", &format!("curl https://raw.githubusercontent.com/foundry-rs/foundry/e0ea59cae26d945445d9cf21fdf22f4a18ac5bb2/foundryup/foundryup | FOUNDRY_DIR={} bash", format_foundry_dir(""))])
-        .stdout(Stdio::piped())
-        .stderr(Stdio::piped())
-        .spawn()
-        .unwrap()
-        .wait_with_output()
-        .unwrap();
-    println!("foundryup status: {:?}", output.status);
-    let stdout = String::from_utf8(output.stdout).unwrap();
-    println!("foundryup stdout: {stdout:?}");
-    let stderr = String::from_utf8(output.stderr).unwrap();
-    println!("foundryup stderr: {stderr:?}");
-    assert!(output.status.success());
-
-    std::fs::write(bin_finished_flag, "").unwrap();
-}
-
-fn compile_contracts() {
-    let output = Command::new(format_foundry_dir("bin/forge"))
-        .args([
-            "build",
-            "--contracts=contracts",
-            "--cache-path",
-            &format_foundry_dir("forge/cache"),
-            "--out",
-            &format_foundry_dir("forge/out"),
-        ])
-        .stdout(Stdio::piped())
-        .stderr(Stdio::piped())
-        .spawn()
-        .unwrap()
-        .wait_with_output()
-        .unwrap();
-    println!("forge status: {:?}", output.status);
-    let stdout = String::from_utf8(output.stdout).unwrap();
-    println!("forge stdout: {stdout:?}");
-    let stderr = String::from_utf8(output.stderr).unwrap();
-    println!("forge stderr: {stderr:?}");
-    assert!(output.status.success());
-}
-
-const ERC6492_FILE: &str = "forge/out/Erc6492.sol/ValidateSigOffchain.json";
-const ERC6492_BYTECODE_FILE: &str = "forge/out/Erc6492.sol/ValidateSigOffchain.bytecode";
-const ERC1271_MOCK_FILE: &str = "forge/out/Erc1271Mock.sol/Erc1271Mock.json";
-const ERC1271_MOCK_BYTECODE_FILE: &str = "forge/out/Erc1271Mock.sol/Erc1271Mock.bytecode";
-fn extract_bytecodes() {
-    extract_bytecode(
-        &format_foundry_dir(ERC6492_FILE),
-        &format_foundry_dir(ERC6492_BYTECODE_FILE),
-    );
-    extract_bytecode(
-        &format_foundry_dir(ERC1271_MOCK_FILE),
-        &format_foundry_dir(ERC1271_MOCK_BYTECODE_FILE),
-    );
-}
-
-fn extract_bytecode(input_file: &str, output_file: &str) {
-    let contents = serde_json::from_slice::<Value>(&std::fs::read(input_file).unwrap()).unwrap();
-    let bytecode = contents
-        .get("bytecode")
-        .unwrap()
-        .get("object")
-        .unwrap()
-        .as_str()
-        .unwrap()
-        .strip_prefix("0x")
-        .unwrap();
-    let bytecode = alloy_primitives::hex::decode(bytecode).unwrap();
-    std::fs::write(output_file, bytecode).unwrap();
-}
diff --git a/bytecode/Erc1271Mock.sol/Erc1271Mock.bytecode b/bytecode/Erc1271Mock.sol/Erc1271Mock.bytecode
new file mode 100644
index 0000000..fccd1d0
Binary files /dev/null and b/bytecode/Erc1271Mock.sol/Erc1271Mock.bytecode differ
diff --git a/bytecode/Erc6492.sol/ValidateSigOffchain.bytecode b/bytecode/Erc6492.sol/ValidateSigOffchain.bytecode
new file mode 100644
index 0000000..0692986
Binary files /dev/null and b/bytecode/Erc6492.sol/ValidateSigOffchain.bytecode differ
diff --git a/devloop.sh b/devloop.sh
index dc96892..7b4989b 100755
--- a/devloop.sh
+++ b/devloop.sh
@@ -1,6 +1,14 @@
 #!/bin/bash
 set -e
 
+forge build --contracts=contracts
+
+mkdir -p bytecode/Erc6492.sol
+jq -r .bytecode.object out/Erc6492.sol/ValidateSigOffchain.json | xxd -r -p > bytecode/Erc6492.sol/ValidateSigOffchain.bytecode
+
+mkdir -p bytecode/Erc1271Mock.sol
+jq -r .bytecode.object out/Erc1271Mock.sol/Erc1271Mock.json | xxd -r -p > bytecode/Erc1271Mock.sol/Erc1271Mock.bytecode
+
 cargo fmt --all
 cargo clippy --workspace --all-features --all-targets -- -D warnings
 cargo test --workspace --all-features --all-targets
diff --git a/src/lib.rs b/src/lib.rs
index 4e02107..7f968a5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -13,10 +13,8 @@ sol! {
     constructor (address _signer, bytes32 _hash, bytes memory _signature);
   }
 }
-const VALIDATE_SIG_OFFCHAIN_BYTECODE: &[u8] = include_bytes!(concat!(
-    env!("OUT_DIR"),
-    "/../../../../.foundry/forge/out/Erc6492.sol/ValidateSigOffchain.bytecode"
-));
+const VALIDATE_SIG_OFFCHAIN_BYTECODE: &[u8] =
+    include_bytes!("../bytecode/Erc6492.sol/ValidateSigOffchain.bytecode");
 
 #[must_use]
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -374,10 +372,8 @@ mod test {
         );
     }
 
-    const ERC1271_MOCK_BYTECODE: &[u8] = include_bytes!(concat!(
-        env!("OUT_DIR"),
-        "/../../../../.foundry/forge/out/Erc1271Mock.sol/Erc1271Mock.bytecode"
-    ));
+    const ERC1271_MOCK_BYTECODE: &[u8] =
+        include_bytes!("../bytecode/Erc1271Mock.sol/Erc1271Mock.bytecode");
     const ERC6492_MAGIC_BYTES: [u16; 16] = [
         0x6492, 0x6492, 0x6492, 0x6492, 0x6492, 0x6492, 0x6492, 0x6492, 0x6492, 0x6492, 0x6492,
         0x6492, 0x6492, 0x6492, 0x6492, 0x6492,