diff --git a/EVM-and-opcodes/README.md b/evm_and_opcods/README.md similarity index 100% rename from EVM-and-opcodes/README.md rename to evm_and_opcods/README.md diff --git a/EVM-and-opcodes/opcodes.md b/evm_and_opcods/opcodes.md similarity index 100% rename from EVM-and-opcodes/opcodes.md rename to evm_and_opcods/opcodes.md diff --git a/Gray-Hat/README.md b/gray_hat_stuff/README.md similarity index 100% rename from Gray-Hat/README.md rename to gray_hat_stuff/README.md diff --git a/Solidity-Expert/Boilerplates/erc721-solidity-101/.env_sample b/master_solidity/boilerplates/erc721-solidity-101/.env_sample similarity index 100% rename from Solidity-Expert/Boilerplates/erc721-solidity-101/.env_sample rename to master_solidity/boilerplates/erc721-solidity-101/.env_sample diff --git a/Solidity-Expert/Boilerplates/erc721-solidity-101/README.md b/master_solidity/boilerplates/erc721-solidity-101/README.md similarity index 100% rename from Solidity-Expert/Boilerplates/erc721-solidity-101/README.md rename to master_solidity/boilerplates/erc721-solidity-101/README.md diff --git a/Solidity-Expert/Boilerplates/erc721-solidity-101/contracts/MiaNFT.sol b/master_solidity/boilerplates/erc721-solidity-101/contracts/MiaNFT.sol similarity index 100% rename from Solidity-Expert/Boilerplates/erc721-solidity-101/contracts/MiaNFT.sol rename to master_solidity/boilerplates/erc721-solidity-101/contracts/MiaNFT.sol diff --git a/Solidity-Expert/Boilerplates/erc721-solidity-101/hardhat.config.js b/master_solidity/boilerplates/erc721-solidity-101/hardhat.config.js similarity index 100% rename from Solidity-Expert/Boilerplates/erc721-solidity-101/hardhat.config.js rename to master_solidity/boilerplates/erc721-solidity-101/hardhat.config.js diff --git a/Solidity-Expert/Boilerplates/erc721-solidity-101/package.json b/master_solidity/boilerplates/erc721-solidity-101/package.json similarity index 100% rename from Solidity-Expert/Boilerplates/erc721-solidity-101/package.json rename to master_solidity/boilerplates/erc721-solidity-101/package.json diff --git a/Solidity-Expert/Boilerplates/erc721-solidity-101/scripts/deploy-contract.js b/master_solidity/boilerplates/erc721-solidity-101/scripts/deploy-contract.js similarity index 100% rename from Solidity-Expert/Boilerplates/erc721-solidity-101/scripts/deploy-contract.js rename to master_solidity/boilerplates/erc721-solidity-101/scripts/deploy-contract.js diff --git a/Solidity-Expert/Boilerplates/erc721-solidity-101/scripts/mint-nft.js b/master_solidity/boilerplates/erc721-solidity-101/scripts/mint-nft.js similarity index 100% rename from Solidity-Expert/Boilerplates/erc721-solidity-101/scripts/mint-nft.js rename to master_solidity/boilerplates/erc721-solidity-101/scripts/mint-nft.js diff --git a/Solidity-Expert/L2-and-Rollups/README.md b/master_solidity/l2_and_rollups/README.md similarity index 100% rename from Solidity-Expert/L2-and-Rollups/README.md rename to master_solidity/l2_and_rollups/README.md diff --git a/Solidity-Expert/Tricks-to-save-gas/README.md b/master_solidity/saving_gas/README.md similarity index 100% rename from Solidity-Expert/Tricks-to-save-gas/README.md rename to master_solidity/saving_gas/README.md diff --git a/Solidity-Expert/Setting-up-your-workspace/remix-IDE.md b/master_solidity/setting_workspace/remix-IDE.md similarity index 100% rename from Solidity-Expert/Setting-up-your-workspace/remix-IDE.md rename to master_solidity/setting_workspace/remix-IDE.md diff --git a/Solidity-Expert/Writing-Tests/unit-testing.md b/master_solidity/tests/unit-testing.md similarity index 100% rename from Solidity-Expert/Writing-Tests/unit-testing.md rename to master_solidity/tests/unit-testing.md diff --git a/Solidity-Expert/Token-standards/README.md b/master_solidity/token_standards/README.md similarity index 100% rename from Solidity-Expert/Token-standards/README.md rename to master_solidity/token_standards/README.md diff --git a/Solidity-Expert/Token-standards/erc20.md b/master_solidity/token_standards/erc20.md similarity index 100% rename from Solidity-Expert/Token-standards/erc20.md rename to master_solidity/token_standards/erc20.md diff --git a/Solidity-Expert/Token-standards/erc721.md b/master_solidity/token_standards/erc721.md similarity index 100% rename from Solidity-Expert/Token-standards/erc721.md rename to master_solidity/token_standards/erc721.md diff --git a/Solidity-Expert/Token-standards/erc777.md b/master_solidity/token_standards/erc777.md similarity index 100% rename from Solidity-Expert/Token-standards/erc777.md rename to master_solidity/token_standards/erc777.md diff --git a/Smart-Contract-Security/README.md b/smart_contracts_vulnerabilities/README.md similarity index 100% rename from Smart-Contract-Security/README.md rename to smart_contracts_vulnerabilities/README.md diff --git a/Smart-Contract-Security/arithmetic-bugs-notes.md b/smart_contracts_vulnerabilities/arithmetic-bugs-notes.md similarity index 100% rename from Smart-Contract-Security/arithmetic-bugs-notes.md rename to smart_contracts_vulnerabilities/arithmetic-bugs-notes.md diff --git a/Smart-Contract-Security/ddos-notes.md b/smart_contracts_vulnerabilities/ddos-notes.md similarity index 100% rename from Smart-Contract-Security/ddos-notes.md rename to smart_contracts_vulnerabilities/ddos-notes.md diff --git a/Smart-Contract-Security/delegatecall-notes.md b/smart_contracts_vulnerabilities/delegatecall-notes.md similarity index 100% rename from Smart-Contract-Security/delegatecall-notes.md rename to smart_contracts_vulnerabilities/delegatecall-notes.md diff --git a/Smart-Contract-Security/pentesting.md b/smart_contracts_vulnerabilities/pentesting.md similarity index 100% rename from Smart-Contract-Security/pentesting.md rename to smart_contracts_vulnerabilities/pentesting.md diff --git a/Smart-Contract-Security/proxies.md b/smart_contracts_vulnerabilities/proxies.md similarity index 100% rename from Smart-Contract-Security/proxies.md rename to smart_contracts_vulnerabilities/proxies.md diff --git a/Smart-Contract-Security/random-notes.md b/smart_contracts_vulnerabilities/random-notes.md similarity index 100% rename from Smart-Contract-Security/random-notes.md rename to smart_contracts_vulnerabilities/random-notes.md diff --git a/Smart-Contract-Security/reentrancy-notes.md b/smart_contracts_vulnerabilities/reentrancy-notes.md similarity index 100% rename from Smart-Contract-Security/reentrancy-notes.md rename to smart_contracts_vulnerabilities/reentrancy-notes.md diff --git a/Smart-Contract-Security/sandwich-notes.md b/smart_contracts_vulnerabilities/sandwich-notes.md similarity index 100% rename from Smart-Contract-Security/sandwich-notes.md rename to smart_contracts_vulnerabilities/sandwich-notes.md