installation.md

@@ -24,7 +24,7 @@ While the core protocol is written purely in C/C++, [Cython](http://cython.org/)
 ### Prerequisites
 
 ```bash
-pip install Cython==0.27.3
+pip3 install Cython==0.27.3
 ```
 
 ### Setup
@@ -32,5 +32,5 @@ pip install Cython==0.27.3
 The protocol can be installed system-wide as follows:
 
 ```bash
-python setup.py install
+python3 setup.py install
 ```
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