Error with https://ieeeghn.org/wiki/index.php/History_of_Lossless_Data_Compression_Algorithms

exception = HTTPSConnectionPool(host='ieeeghn.org', port=443): Max retries exceeded with url: /wiki/index.php/History_of_Lossless_Data_Compression_Algorithms (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed certificate (_ssl.c:992)')))