The paper investigated the challenges facing Lecturers in embracing Collaborative Web Technologies (CWTs) in Higher Education Institutions (HEIs) in Tanzania. The study was motivated by the fact that while students have become natives of the CWTs, for the Lecturers, the case if different. A case study was designed to answer two research questions using questionnaires and interviews administered to 120 randomly obtained sample. The results show five major challenges such as lack of a guiding framework on CWTs; lack of ICT Policy on CWTs; unreliable ICT Infrastructure; lack of awareness; and poor internet connections. The paper submits that CWTs are essential tools to enhance learning and teaching in HEIs in Tanzania. The paper is a contribution to the existing body of knowledge and advances knowledge in the application of CWTs to the HEIs population in Tanzania.