JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)(1)

EXHIBIT 1

JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)(1)

This agreement is made pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended (the “Act”) by and among the parties listed below, each referred to herein as a “Joint Filer.” The Joint Filers agree that a statement of beneficial ownership as required by Section 13(d) of the Act and the Rules thereunder may be filed on each of their behalf on Schedule 13D or Schedule 13G, as appropriate, and that said joint filing may thereafter be amended by further joint filings. The Joint Filers state that they each satisfy the requirements for making a joint filing under Rule 13d-1.

Dated: August 21, 2015				FRANCISCO PARTNERS IV, L.P.
				By:		Francisco Partners XX XX, L.P., its General Partner
				By:		Francisco Partners XX XX Management Limited, its General Partner
				By:		/s/ Xxx Xxxxxx
				Name:		Xxx Xxxxxx
				Title:		Director
				FRANCISCO PARTNERS IV-A, L.P.
				By:		Francisco Partners XX XX, L.P., its General Partner
				By:		Francisco Partners XX XX Management Limited, its General Partner
				By:		/s/ Xxx Xxxxxx
				Name:		Xxx Xxxxxx
				Title:		Director
				FRANCISCO PARTNERS XX XX, L.P.
				By:		Francisco Partners XX XX Management Limited, its General Partner
				By:		/s/ Xxx Xxxxxx
				Name:		Xxx Xxxxxx
				Title:		Director
				FRANCISCO PARTNERS XX XX MANAGEMENT LIMITED
				By:		/s/ Xxx Xxxxxx
				Name:		Xxx Xxxxxx
				Title:		Director