Exhibit 3.1

CERTIFICATE OF AMENDMENT

TO THE

AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

BRIDGELINE DIGITAL, INC.

Pursuant to Section 242 of the

General Corporation Law of the State of Delaware

Bridgeline Digital, Inc. (hereinafter called the “Corporation”), a corporation organized and existing under and by virtue of the General Corporation Law of the State of Delaware, does hereby certify as follows:

At a meeting held on March 4, 2015 a resolution was duly adopted by the Board of Directors of the Corporation pursuant to Section 242 of the General Corporation Law of the State of Delaware setting forth an amendment to the Amended and Restated Certificate of Incorporation of the Corporation and declaring said amendment to be advisable.  The stockholders of the Corporation duly approved said proposed amendment at a special meeting of stockholders held on May 4, 2015, in accordance with Section 242 of the General Corporation Law of the State of Delaware.  Such amendment shall be effective as of 5:00 p.m. on May 7, 2015. The resolution setting forth the amendment is as follows:

“The Corporation is authorized to issue two classes of stock to be designated, respectively, “Common Stock” and “Preferred Stock.” The total number of shares of all classes of stock that the Corporation shall have the authority to issue is Fifty-One Million (51,000,000), of which Fifty Million (50,000,000) shares shall be Common Stock, having a par value of $.001 per share, and of which One Million (1,000,000) shares shall be Preferred Stock, having a par value of $.001 per share.

That, effective at 5:00 p.m., Eastern time, on May 7, 2015, (the “Effective Time”), a one-for-five reverse stock split of the Corporation’s Common Stock shall become effective, pursuant to which each five shares of Common Stock outstanding and held of record by each stockholder of the Corporation (including treasury shares) immediately prior to the Effective Time (“Old Common Stock”) shall be reclassified and combined into one share of Common Stock automatically and without any action by the holder thereof upon the Effective Time and shall represent one share of Common Stock from and after the Effective Time (“New Common Stock”).

No fractional shares of Common Stock will be issued in connection with the reverse stock split. Stockholders of record who otherwise would be entitled to receive fractional shares, will be entitled to rounding up of their fractional shares to the nearest whole share. No stockholders will receive cash in lieu of fractional shares.

Each holder of record of a certificate or certificates for one or more shares of the Old Common Stock shall be entitled to receive as soon as practicable, upon surrender of such certificate, a certificate or certificates representing the largest whole number of shares of New Common Stock to which such holder shall be entitled pursuant to the provisions of the immediately preceding paragraphs. Any certificate for one or more shares of the Old Common Stock not so surrendered shall be deemed to represent one share of the New Common Stock for each five shares of the Old Common Stock previously represented by such certificate.

IN WITNESS WHEREOF, the Corporation has caused this Certificate of Amendment to be signed by its President and Chief Executive Officer this 4^th day of May, 2015.