Because 2 more states had joined the union, the number of stars on the U.S. flag was changed to this in 1795
In 1818, after five more states had gained admittance, Congress passed
... [DOC] [TLE] The Patriotic History of the Stars and Stripes - Flags Galore & More [PAR] On that historic day, the flag of the United States of America came into ... that a 
star and a stripe would be added as each new state joined the Union.