diff --git a/experiment/run_dyn_analysis.sh b/experiment/run_dyn_analysis.sh
index ed8af3e..399c26f 100644
--- a/experiment/run_dyn_analysis.sh
+++ b/experiment/run_dyn_analysis.sh
@@ -5,19 +5,21 @@ FOLDER=$(dirname "$(realpath $0)")
 APK_DIR="${1}"
 RES_DIR="${2}"
 
-if [ ! -f "${APK_DIR}" ]; then
+if [ ! -d "${APK_DIR}" ]; then
     echo "Usage: bash ${0} /path/to/apk/dir /path/to/result/dir"
     echo "    /path/to/apk/dir is the folder where to store the application downloaded"
     echo "    /path/to/result/dir is the folder where to store the analysis results"
     exit
 fi
-if [ ! -f "${RES_DIR}" ]; then
+if [ ! -n "${RES_DIR}" ]; then
     echo "Usage: bash ${0} /path/to/apk/dir /path/to/result/dir"
     echo "    /path/to/apk/dir is the folder where to store the application downloaded"
     echo "    /path/to/result/dir is the folder where to store the analysis results"
     exit
 fi
 
+mkdir -p "${RES_DIR}"
+
 TMP_DIR=$(mktemp -d)
 
 python3 -m venv "${FOLDER}/venv"