diff --git a/README.md b/README.md
index d20a7b1..97e72f5 100644
--- a/README.md
+++ b/README.md
@@ -7,9 +7,9 @@ You need to have ghoscript installed on your machine.
 ```
 git clone https://gitea.auro.re/otthorn/pdf-optimize
 cd pdf-optimize
-chmod +x pdf-optimize
+chmod +x pdf-optimize.sh
 sudo mkdir -p /opt/bin/
-sudo cp pdf-optimize /opt/bin/
+sudo cp pdf-optimize.sh /opt/bin/pdf-optimize
 ```
 
 Don't forget to add `/opt/bin` to your `PATH`.
diff --git a/pdf-optimize b/pdf-optimize
index 93833c8..d2bd9b5 100755
--- a/pdf-optimize
+++ b/pdf-optimize
@@ -17,146 +17,132 @@
 
 function usage
 {
-    echo "usage: pdf-optimize [options] input.pdf"
-    echo "    ";
-    echo "  -a | --archive          : archive mode (PDF/A)";
-    echo "  -c | --compatibility    : compability more with PDF 1.4";
-    echo "  -h | --help             : print this message";
-    echo "  -k | --quality          : choose quality profile from:
-                             * 1 HIGH QUALITY [default]
-                             * 2 LOW QUALITY
-                             * 3 AGGRESSIVE
-                             * 4 VERY AGGRESIVE";
-    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 "    ";
-    echo "If no output path is specified, given input.pdf as input will output
+	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 "    ";
+	echo "If no output path is specified, given input.pdf as input will output
 input_compressed.pdf"
 }
 
 function arg_parse
 {
-    # if no argument is given print help
-    if [[ -z "$1" ]]; then
-        usage; exit;
-    fi
-
-    # positional arguments
-    args=()
-
-    while [ "$1" != "" ]; do
-        case "$1" in
-            -k | --quality )          quality="$2";      shift;; 
-            -o | --output )           output_path="$2";  shift;;
-            -a | --archive )          archive=1;;
-            -c | --compatibility )    compatibility=1;;
-            -q | --quiet )            quiet=1;;
-            -v | --verbose )          verbose=1;;
-            -y | --yes-to-replace )   replace=1;;
-            -h | --help )             usage;             exit;;
-            * )                       args+=("$1")
-        esac
-        shift
-    done
-
-    # restore positional argument
-    set -- "${args[@]}"
-
-    # only the first one should be used
-    input_path="${args[0]}"
-
-    # add default output path if none is given
-    if [[ -z "$output_path" ]]; then
-        output_path="${input_path%.*}_compressed.pdf";
-    fi
-
-    # check if the output file already exists before writting to it
-    if [[ -f "$output_path" && "$replace" == 0 ]]; then
-        yes_or_no "$output_path already exists, do you want to replace it?" ||
-            exit 1;
-    fi
-
-    # check if the input file exists
-    if [[ ! -f "$input_path" ]]; then
-        echo "$input_path does not exist."
-        echo "Aborting";
-        exit 1;
-    fi
+	# if no argument is given print help
+	if [[ -z "$1" ]]; then
+		usage; exit;
+	fi
+
+	# positional arguments
+	args=()
+
+	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+=("$1")
+		esac
+		shift
+	done
+
+	# restore positional argument
+	set -- "${args[@]}"
+
+	# only the first one should be used
+	input_path="${args[0]}"
+
+	# add default output path if none is given
+	if [[ -z "$output_path" ]]; then
+		output_path="${input_path%.*}_compressed.pdf";
+	fi
+
+	# check if the output file already exists before writting to it
+	if [[ -f "$output_path" && "$replace" == 0 ]]; then
+		yes_or_no "$output_path already exists, do you want to replace it?" ||
+			exit 1;
+	fi
+
+	# check if the input file exists
+	if [[ ! -f "$input_path" ]]; then
+		echo "$input_path does not exist."
+		echo "Aborting";
+		exit 1;
+	fi
 }
 
 function yes_or_no
 {
-    read -p "$* [y/N]: " ans
-    case "$ans" in
-        [yY] | [yY]es )     return 0;;
-        * )                 echo "Aborting"; return 1;;
-    esac
+	read -p "$* [y/N]: " ans
+	case "$ans" in
+		[yY] | [yY]es )     return 0;;
+		* )                 echo "Aborting"; return 1;;
+	esac
 }
 
 function run
 {
-    arg_parse "$@";
-    
-    # print general information
-    if [[ "$quiet" != 1 ]]; then
-        echo "Compressing from ${bold}$input_path${normal} into \
+	arg_parse "$@";
+	
+	# print general information
+	if [[ "$quiet" != 1 ]]; then
+		echo "Compressing from ${bold}$input_path${normal} into \
 ${bold}$output_path${normal}."
-    fi
-
-    # define the base command
-    base_command="
-        gs -sDEVICE=pdfwrite \
-           -dPDFSETTINGS=/prepress \
-           -dNOPAUSE \
-           -dBATCH ";
-
-    # add compatibilty
-    if [[ "$compatibility" == 1 ]]; then
-        base_command+="-dCompatibilityLevel=1.4 ";
-    fi
-
-    # ask ghostsript to be quiet
-    if [[ "$verbose" == 1 ]]; then
-        base_command+="-dQUIET ";
-    fi
-    
-    # add archive mode option
-    if [[ "$archive" == 1 ]]; then
-        base_command+="-dPDFA=2 -dPDFACompatibilityPolicy=1 "
-    fi
-
-    # add input and ouput paths
-    base_command+="-sOutputFile=$output_path \
-           $input_path"
-
-    # run command
-    echo $base_command;
-    #eval $base_command;
-
-    # catching errors
-    if [[ "$?" != 0 ]]; then
-        echo "Something went wrong with ghostscript.";
-        echo "Aborting.";
-        exit 1;
-    fi
-
-    # compute the compresion rate
-    if [[ "$quiet" != 1 ]]; then
-        #compute_compression;
-    fi
+	fi
+
+	# run the compression using ghostscript
+	if [[ "$verbose" != 1 ]]; then
+		ghostscript -sDEVICE=pdfwrite \
+		   -dCompatibilityLevel=1.4 \
+		   -dPDFSETTINGS=/prepress \
+		   -dNOPAUSE \
+		   -dQUIET \
+		   -dBATCH \
+		   -sOutputFile=$output_path \
+		   $input_path
+	else
+		echo "input_path=$input_path";
+		echo "output_path=$output_path";
+		echo "quiet=$quiet";
+		echo "verbose=$verbose";
+		echo "replace=$replace";
+		echo "    ";
+		ghostscript -sDEVICE=pdfwrite \
+		   -dCompatibilityLevel=1.4 \
+		   -dPDFSETTINGS=/prepress \
+		   -dNOPAUSE \
+		   -dBATCH \
+		   -sOutputFile=$output_path \
+		   $input_path 
+	fi
+	
+	# catching errors
+	if [[ "$?" != 0 ]]; then
+		echo "Something went wrong with ghostscript.";
+		echo "Aborting.";
+		exit 1;
+	fi
+
+	# compute the compresion rate
+	if [[ "$quiet" != 1 ]]; then
+		compute_compression;
+	fi
 }
 
 function compute_compression
 {
-    input_size=`du "$input_path" | cut -f1`
-    output_size=`du "$output_path" | cut -f1`
-    percentage=`echo "scale=1;$output_size / $input_size * 100" | bc -l`
-    input_size_h=`du -h "$input_path" | cut -f1`
-    output_size_h=`du -h "$output_path" | cut -f1`
+	input_size=`du "$input_path" | cut -f1`
+	output_size=`du "$output_path" | cut -f1`
+	percentage=`echo "scale=1;$output_size / $input_size * 100" | bc -l`
+	input_size_h=`du -h "$input_path" | cut -f1`
+	output_size_h=`du -h "$output_path" | cut -f1`
 
-    echo "Size reduced from ${bold}$input_size_h${normal} to \
+	echo "Size reduced from ${bold}$input_size_h${normal} to \
 ${bold}$output_size_h${normal} [$percentage %]"
 }