diff --git a/documentation/Sphinx/source/index.rst b/documentation/Sphinx/source/index.rst
index 2ca1ab110f234b6de6d0093c3c9d03caeff55fbe..869a1bcd919c72a5a5e696d84a28a38fcbd1cc85 100644
--- a/documentation/Sphinx/source/index.rst
+++ b/documentation/Sphinx/source/index.rst
@@ -13,7 +13,7 @@ flex_extract is a software to retrieve meteorological fields from the European C
 .. state gateway server or HPC facility using the ecaccess software package. As another option the scripts can 3)
 .. also be triggered using ecflow scheduling software used by ECMWF for data dissemination.
 
-All required second party software and libraries used within flex_extract is open source and free of charge. 
+All third-party software and libraries required by flex_extract are open source and free of charge. 
 
 .. raw:: html