diff --git a/pdf-optimize.sh b/pdf-optimize.sh
index d2a8678..41da97b 100755
--- a/pdf-optimize.sh
+++ b/pdf-optimize.sh
@@ -5,11 +5,11 @@ function usage
 {
 	echo "usage: pdf-optimize [options] input.pdf"
 	echo "    ";
-	echo "  -o | --output			: output filename";
-	echo "  -q | --quiet			: run quietly";
-	echo "  -v | --verbose		: run verbosly";
-	echo "  -y | --yes-to-replace 	: yes to replace existing files";
-	echo "  -h | --help			: print this message";
+	echo "  -o | --output           : output filename";
+	echo "  -q | --quiet            : run quietly";
+	echo "  -v | --verbose          : run verbosly";
+	echo "  -y | --yes-to-replace   : yes to replace existing files";
+	echo "  -h | --help             : print this message";
 	echo "    ";
 	echo "If no output path is specified, given input.pdf as input will output
 input_compressed.pdf"
@@ -27,12 +27,12 @@ function arg_parse
 
 	while [ "$1" != "" ]; do
 		case "$1" in
-			-o | --output )			output_path="$2";		shift;;
-			-q | --quiet )			quiet=1;;
-			-v | --verbose )    	verbose=1;;
-			-y | --yes-to-replace ) replace=1;;
-			-h | --help )			usage; 					exit;;
-			* )						args+=("$1")
+			-o | --output )           output_path="$2";  shift;;
+			-q | --quiet )            quiet=1;;
+			-v | --verbose )          verbose=1;;
+			-y | --yes-to-replace )   replace=1;;
+			-h | --help )             usage;             exit;;
+			* )                       args+=("$1")
 		esac
 		shift
 	done