diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1d17dae
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.venv
diff --git a/Zydra.py b/Zydra.py
index 830b48e..761395a 100644
--- a/Zydra.py
+++ b/Zydra.py
@@ -584,7 +584,7 @@ def banner(self):
         # sudo wget http://www.figlet.org/fonts/epic.flf -O /usr/share/figlet/epic.flf
         bannerfont = "epic" if os.path.exists('/usr/share/figlet/epic.flf') else "banner"
         banner = pyfiglet.figlet_format("ZYDRA", font=bannerfont).replace("\n", "\n\t\t", 7)
-		
+
         cprint("\r\n\t" + "@" * 61, "blue", end="")
         cprint("\n\t\t" + banner + "\t\tAuthor : Hamed Hosseini", "blue", attrs=['bold'])
         cprint("\t" + "@" * 61 + "\n", "blue")
@@ -623,8 +623,8 @@ def main(self):
         parser.add_option("-d", dest="dictfile", type='string', help="Specifies dictionary file")
         parser.add_option("-f", dest="file", type='string', help="Specifies the file")
         parser.add_option("-b", dest="chartype", type='string', help="Specifies the character type")
-        parser.add_option("-m", dest="minlength", type='string', help="Specifies minimum length of password")
-        parser.add_option("-x", dest="maxlength", type='string', help="Specifies maximum length of password")
+        parser.add_option("-m", dest="minlength", type='int', help="Specifies minimum length of password")
+        parser.add_option("-x", dest="maxlength", type='int', help="Specifies maximum length of password")
 
         (options, args) = parser.parse_args()
         try:
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..169b8f5
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,4 @@
+py-term==0.6
+pyfiglet==0.8.post1
+rarfile==4.0
+termcolor==1.1.0
diff --git a/script.sh b/script.sh
index 416abce..a26b556 100644
--- a/script.sh
+++ b/script.sh
@@ -10,14 +10,12 @@ DEBIAN_FRONTEND=noninteractive apt-get -y -o Dpkg::Options::="--force-confdef" -
 
 sudo apt-get install qpdf -y
 sudo apt-get install unrar -y
-sudo apt-get install python3.7 -y 
+sudo apt-get install python3.7 -y
 sudo apt-get install python3-pip -y
 pip3 --version
 
-pip3 install zipfile
-pip3 install rarfile
-pip3 install pyfiglet
-pip3 install py-term
-pip3 install termcolor
-
+python -m venv .venv
+source .venv/bin/activate
+pip install pip --upgrade
+pip install -r requirements.txt
 cd /vagrant/