diff --git a/README.md b/README.md
index c569c96..327478e 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ If you've ever tried encoding GIFs with `ffmpeg` there's a good chance your resu
 $ gifgen -h
 gifgen 1.1.0
 
-Usage: gifgen [options]
+Usage: gifgen [options] [input]
 
 Options:
   -o   Output file [input.gif]
diff --git a/gifgen b/gifgen
index 4481567..fb28d83 100755
--- a/gifgen
+++ b/gifgen
@@ -4,7 +4,7 @@
 show_help() {
   echo "gifgen 1.1.0"
   echo
-  echo "Usage: gifgen [options]"
+  echo "Usage: gifgen [options] [input]"
   echo
   echo "Options:"
   echo "  -o   Output file [input.gif]"