Deployment of a modified service affects the functioning of other services that make use of the service. To address the problems that deployment of modified executable code can cause in other services, a dependency lock is placed on candidate code to prevent deployment until tests on the client services are successfully completed. Developers of client services that rely on a supplier service are enabled to place a dependency lock on the service. As a result, deployment of the supplier service is only allowed when tests of the client services complete successfully. The administrator of the service being deployed may control which other users are able to add dependency locks without giving those users other permissions such as the ability to modify the source code of the service, the ability to deploy the service, and the like.