diff --git a/screen.py b/screen.py
index 3d489d1..48dfe4c 100755
--- a/screen.py
+++ b/screen.py
@@ -27,7 +27,7 @@ from PIL import ImageGrab as ig
 
 class Screen():
     def __init__(self):
-        self.FPS = 10
+        self.FPS = 4
         self.screenbuf = ""
         self.password = ""
         if ver==2:
diff --git a/screenshare.py b/screenshare.py
index bc0c702..2d75a1e 100755
--- a/screenshare.py
+++ b/screenshare.py
@@ -67,7 +67,7 @@ def screenfeed():
 ### main ###
 if __name__ == '__main__':
     parser = argparse.ArgumentParser()
-    parser.add_argument("-p", "--port", help="port, default 18331", type=int, default=18331)
+    parser.add_argument("-p", "--port", help="port, default 8888", type=int, default=8888)
     parser.add_argument("-w", "--password", help="password, default no password", default="")
     parser.add_argument("-s", "--https", help="enable https, default http", action="store_true")
     parser.add_argument("-c", "--cert", help="certificate file")
diff --git a/static/js/screen.js b/static/js/screen.js
index 192a1c1..f7c673c 100755
--- a/static/js/screen.js
+++ b/static/js/screen.js
@@ -17,7 +17,7 @@ You should have received a copy of the GNU General Public License
 along with Screenshare. If not, see <https://www.gnu.org/licenses/>.
 */
 
-var frameinterval = 200;     // 200 milliseconds means 5 frames per second
+var frameinterval = 500;     // 200 milliseconds means 5 frames per second
 var frameerrcount = 0;
 var screenfeedtimeout = null;