diff --git a/cplex_instruction.md b/cplex_instruction.md
index 0e8a356..639336a 100644
--- a/cplex_instruction.md
+++ b/cplex_instruction.md
@@ -1,21 +1,21 @@
 ## Instruction for CPLEX Python API
 
 #### 1. Download and install CPLEX Optimization Studio
-Download [IBM ILOG CPLEX Optimizer](
-http://www-01.ibm.com/software/websphere/products/optimization/cplex-studio-community-edition/), then install it step by step.
+Download [IBM ILOG CPLEX Optimization Studio](
+https://www.ibm.com/account/reg/signup?formid=urx-20028), then install it step by step.
 
-####  2. Download and install "Visual C++ Redistributable Packages for Visual Studio 2013"(Windows only)
-[Visual C++ Redistributable Packages for Visual Studio 2013](https://www.microsoft.com/en-US/download/details.aspx?id=40784)
+####  2. Download and install "Visual C++ Redistributable Packages for Visual Studio 2015" (Windows only)
+[Visual C++ Redistributable Packages for Visual Studio 2015](https://www.microsoft.com/fr-fr/download/details.aspx?id=48145)
 
 ####  3. Install python.
-SPSS Modeler prefer [Anaconda python (2.7)](https://www.continuum.io/downloads).
+SPSS Modeler prefers [Anaconda python (2.7)](https://www.continuum.io/downloads).
 
 ####  4. Install CPLEX python package
-Go to {CPLEX Optimization Studio install folder}\cplex\python\2.7\{os} and run "python setup.py install"
+Go to {CPLEX Optimization Studio install folder}\cplex\python\2.7\\{os} and run "python setup.py install"
 
 Notes: 
 - a. refer to this [link](
-http://www.ibm.com/support/knowledgecenter/SSSA5P_12.5.1/ilog.odms.cplex.help/CPLEX/GettingStarted/topics/set_up/Python_setup.html) for more detail information.
+https://www.ibm.com/support/knowledgecenter/SSSA5P_12.9.0/ilog.odms.cplex.help/CPLEX/GettingStarted/topics/set_up/Python_setup.html) for more detailed information.
 
 ####  5. Run "pip install docplex"
 Ensure pip enable, and run `pip install docplex` to install [docplex](https://pypi.python.org/pypi/docplex) package.