diff --git a/iat.py b/iat.py
index e265da5..d5fa9cb 100644
--- a/iat.py
+++ b/iat.py
@@ -59,14 +59,14 @@ def link_func_to_dll(func_list):
     return res
 
 def main():
-    parser = argparse.ArgumentParser(prog="iat.py", description="Create a patched PE from a binary dump and a traceCFG file.")
+    parser = argparse.ArgumentParser(prog="iat.py", description="Create a patched PE from a binary dump and a traceCFG file.", formatter_class=argparse.ArgumentDefaultsHelpFormatter)
 
     # Input arguments
-    parser.add_argument("dump", type=str, help="The path to the wave dump file")
-    parser.add_argument("trace", type=str, help="The path to the traceCFG file")
+    parser.add_argument("dump", type=str, help="The path to the wave dump file (usually ends with .dump)")
+    parser.add_argument("trace", type=str, help="The path to the traceCFG file (.json)")
 
     # Additional arguments
-    parser.add_argument("-o", "--output", type=str, help="Specify an output filepath for the patched PE.")
+    parser.add_argument("-o", "--output", type=str, default="patched.exe", help="Specify an output filepath for the patched PE.")
     parser.add_argument("-w", "--wave", type=int, help="Specify the wave number for the binary dump (if it can't be inferred from the filename)")
     parser.add_argument("-v", '--verbose', action='store_true', help="Output additional debug info")