#support I faced an error like below Error: Truffle is currently using solc 0.6.6, but one or more of your contracts specify "pragma solidity ^0.5.0". I’ve already changed the version of all contracts in my project to > 0.6.6 but still, this error doesn’t disappear. :computer: Environment Tr…

Hi @wat , I recommend not modifying the contracts in node_modules. _From: https://docs.openzeppelin.com/contracts/3.x/#usage_ To keep your system secure, you should always use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. If you want to use a d…

Hi @wat , The current version of OpenZeppelin Contracts v3.3 uses Solidity 0.6. (also supports Solidity 0.7). OpenZeppelin Contracts v2.x uses Solidity 0.5. Can you check what version of OpenZeppelin Contracts you are using in your package.json? I suspect you have OpenZeppelin Contracts v2.5 inst…

Hi @abcoathup . thanks for your support. I could successfully compile my contracts by replacing the openzeppelin contract codes in node_modues which remained actually 0.5.0 version.

Hi @wat , I wanted to check that you were able to install and use the appropriate version of OpenZeppelin Contracts?

Hi @abcoathup . sorry for the late reply. if I remember correctly, the way of replacing was copy&paste for the contracts which caused errors. So I will reinstall the source codes instead. thanks. btw, there haven’t been any errors due to this modification so far though.

Hi, I am trying to do this but it doesn’t work as described on my Macbook: npm install @openzeppelin/contracts → installs pragma solidity ^0.5.0 npm install @openzeppelin/contracts@solc-0.7 → doesn’t work, error ‘No matching version found for @openzeppelin/contracts@solc-0.7’ simply trying to fol…

if you want the v3 version using solc 0.7 you can do :slight_smile: yarn add @openzeppelin/contracts@3.4.1-solc-0.7-2

for solidity 0.6.6, this worked for me. npm install @openzeppelin/contracts@^3

The simplest way for you to solve this problem is changing version in truffle-config.js file: [image]

How to specify the version of imported OpenZeppelin Contracts?

Support Contracts

Topic		Replies	Views
How to use OpenZepplin Contracts (with Solidity version ^0.6.0) in Truffle? Contracts	5	4690	September 7, 2020
Pragma solidity 0.5.7 for contract Contracts	1	1765	May 22, 2021
How to import openzepplin specified version in truffle Contracts truffle	0	1073	November 14, 2021
Truffle is currently using solc 0.7.0, but one or more of your contracts specify "pragma solidity ^0.6.0" Contracts	4	4785	November 25, 2020
Default install of contracts always defaults to version 3x Support	0	267	July 7, 2021

How to specify the version of imported OpenZeppelin Contracts?

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