predsim is a simple command-line tool for simulating predictive datasets from MrBayes output files. Datasets can be simulated under the GTR+G+I substitution model or any nested variant available in MrBayes (JC69, HKY85 etc.). The code is contained within a single module that can also be imported using Python's import mechanism. It uses Seq-Gen for simulating the DNA-sequences and builds on the third-party library DendroPy. The code has been tested with Python 2.7 and 3.6. Source repository: https://github.com/jmenglund/predsim This minor release make it possible to output data to the PHYLIP format and fixes a bug in reading the p-file.