diff --git a/README.md b/README.md
index 9e88f95..c70e450 100644
--- a/README.md
+++ b/README.md
@@ -6,11 +6,21 @@
 
 ## Quick Start
 ### Requirement
-`pip install sqlite3 numpy`
 
-`pip freeze | grep numpy`
+```
+Linux ( Debian / Ubuntu ):
+apt-get install python-matplotlib
+pip install -r requirements.txt
 
-numpy==1.11.1, python2/3的環境下皆可運行
+Linux ( Fedora / Redhat ):
+yum install python-matplotlib
+pip install -r requirements.txt
+
+Mac OSX:
+pip install matplotlib
+pip install -r requirements.txt
+
+```
 
 
 ### Annealing parameters
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..b43028e
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+numpy==1.11.1