Fix readme

Author: h-vetinari

README.md

@@ -163,9 +163,9 @@ pip install pandas
 ```
 
 ## Dependencies
-- [NumPy](https://www.numpy.org): 1.12.0 or higher
+- [NumPy](https://www.numpy.org): 1.13.3 or higher
 - [python-dateutil](https://labix.org/python-dateutil): 2.5.0 or higher
-- [pytz](https://pythonhosted.org/pytz): 2011k or higher
+- [pytz](https://pythonhosted.org/pytz): 2013b or higher
 
 See the [full installation instructions](https://pandas.pydata.org/pandas-docs/stable/install.html#dependencies)
 for recommended and optional dependencies.