diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7fa2790
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+__pycache__/
+*.pem
\ No newline at end of file
diff --git a/README.md b/README.md
index 07c168e..65e82b6 100755
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ This tool can run on Linux, Windows and MAC.
 
 ## Install
 
-1. pip install flask-bootstrap pyscreenshot pyopenssl pillow
+1. pip install -r requirements.txt
 
 2. In a directory, run "**git clone https://github.com/qijungu/screenshare.git**". You will have a new directory "screenshare" with code inside.
 
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..18f4169
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,4 @@
+flask-bootstrap
+pyscreenshot
+pyopenssl
+pillow
\ No newline at end of file