diff --git a/README.md b/README.md
index c3211c1..a31a131 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# gexsys - Guile Expert Sysytem.
+# gexsys - Guile Expert System.
 
 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.2596628.svg)](https://doi.org/10.5281/zenodo.2596628)