Can I report these expenses as a deduction on Schedule C even though the licenses/certifications were necessary for both jobs?

I have both W2 income (my main source of income) and a small amount of 1099 income in 2017 from a small business that I started towards the end of the year. Both the W2 job and the 1099 job require the same licenses and certifications, which I paid for out of pocket and were not reimbursed. Can I report these expenses as a deduction on Schedule C even though the licenses/certifications were necessary for both jobs?