@stton Okay, if I remove the parenthesis it works fine in the playground, but I still cannot get it to work inside the update function: methods: { updatePerson () { this.$apollo.mutate({ mutation: UPDATE_PERSON_MUTATION, id: 'cjf4g99x7f3ak0124dxjqg7pc', displayName: 'Test' }) .catch((error) => { console.error(error) }) } } Any ideas?

have it struck you that you should actually use the variables instead of those fixed values ? 😄