diff --git a/.env.example b/.env.example
new file mode 100644
index 000000000..3c34cf678
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,26 @@
+# Example environment configuration for FHEVM
+
+# RPC endpoint for the Ethereum network used by FHEVM contracts.
+FHEVM_ETH_RPC_URL=https://your-ethereum-node-url
+
+# Endpoint for the Zama relayer service.
+FHEVM_RELAYER_URL=https://your-relayer-url
+
+# TFHE worker URL used by the coprocessor (e.g. coprocessor/fhevm-engine).
+TFHE_WORKER_URL=http://localhost:3000
+
+# Private key of the deployer/test account (never commit real keys).
+PRIVATE_KEY=0x...
+
+# Network name: 'local', 'sepolia', 'mainnet', etc.
+NETWORK=local
+
+# Path for persistent storage (used by benchmark parser and golden images).
+DATABASE_URL=./data/db.sqlite
+
+# AWS region and credentials used by CI back‑ends (optional).
+AWS_REGION=eu-west-3
+AWS_ACCESS_KEY_ID=YOUR_AWS_KEY
+AWS_SECRET_ACCESS_KEY=YOUR_AWS_SECRET
+
+# Copy this file to `.env` or `.env.local` and adjust the values as needed.
diff --git a/library-solidity/package.json b/library-solidity/package.json
index 1247f0013..374103596 100644
--- a/library-solidity/package.json
+++ b/library-solidity/package.json
@@ -42,9 +42,9 @@
     "@nomicfoundation/hardhat-network-helpers": "^1.0.6",
     "@nomicfoundation/hardhat-toolbox": "^5.0.0",
     "@nomicfoundation/hardhat-verify": "^2.0.10",
-    "@openzeppelin/contracts": "^5.0.1",
-    "@openzeppelin/contracts-upgradeable": "5.0.2",
-    "@openzeppelin/hardhat-upgrades": "3.3.0",
+    "@openzeppelin/contracts": "^5.5.0",
+    "@openzeppelin/contracts-upgradeable": "5.5.0",
+    "@openzeppelin/hardhat-upgrades": "3.4.0",
     "@trivago/prettier-plugin-sort-imports": "^4.0.0",
     "@typechain/ethers-v6": "^0.5.0",
     "@typechain/hardhat": "^9.1.0",