diff --git a/src/fm_feed.py b/src/fm_feed.py
index 807b337..3ea66fd 100644
--- a/src/fm_feed.py
+++ b/src/fm_feed.py
@@ -44,13 +44,19 @@ def main():
         "--local-addr", help="sender address to use in the UDP frames", required=True
     )
     parser.add_argument(
-        "--local-port", help="sender port to use in the UDP frames", default=4810
+        "--local-port",
+        help="sender port to use in the UDP frames",
+        default=4810,
+        type=int,
     )
     parser.add_argument(
         "--remote-addr", help="remote address to use in the UDP frames", required=True
     )
     parser.add_argument(
-        "--remote-port", help="remote port to use in the UDP frames", default=3810
+        "--remote-port",
+        help="remote port to use in the UDP frames",
+        default=3810,
+        type=int,
     )
 
     parser.add_argument(
diff --git a/src/fm_feed_wav.py b/src/fm_feed_wav.py
index ed688cd..e289b7e 100644
--- a/src/fm_feed_wav.py
+++ b/src/fm_feed_wav.py
@@ -17,16 +17,26 @@ def main():
     )
 
     parser.add_argument(
-        "--local-addr", help="sender address to use in the UDP frames", required=True
+        "--local-addr",
+        help="sender address to use in the UDP frames",
+        required=True,
     )
     parser.add_argument(
-        "--local-port", help="sender port to use in the UDP frames", default=4810
+        "--local-port",
+        help="sender port to use in the UDP frames",
+        default=4810,
+        type=int,
     )
     parser.add_argument(
-        "--remote-addr", help="remote address to use in the UDP frames", required=True
+        "--remote-addr",
+        help="remote address to use in the UDP frames",
+        required=True,
     )
     parser.add_argument(
-        "--remote-port", help="remote port to use in the UDP frames", default=3810
+        "--remote-port",
+        help="remote port to use in the UDP frames",
+        default=3810,
+        type=int,
     )
 
     parser.add_argument(