diff --git a/README.md b/README.md
index 4e662530fc..edcdb5ca17 100644
--- a/README.md
+++ b/README.md
@@ -1588,6 +1588,7 @@ energy system designs and analysis of interactions between technologies.
 - [GISWATER](https://github.com/Giswater/giswater_qgis_plugin) - This software connects different IT solutions and pre-existent databases allowing you to setup a high performance water management system in combination with hydraulic software.
 - [Ribasim](https://github.com/Deltares/Ribasim) - A water resources model, designed to be the replacement of the regional surface water modules Mozart and SIMRES in the Netherlands Hydrological Instrument.
 - [EPyT](https://github.com/OpenWaterAnalytics/EPyT) - A Common programming framework for research and development in the growing field of smart water networks.
+- [Pywr](https://github.com/pywr/pywr) - Simulates customisable water allocation and operation rules throughout complex multi-purpose managed water systems at each user-defined time-step
 
 
 ### Soil and Land