diff --git a/README.md b/README.md
index 824acc4326ce43b93a2f41aabd1099417cbf73bf..bd2c4d28b3e94748dd59763f4b2ec0505dcb2ec5 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,8 @@ please see <http://www.ks.uiuc.edu/Research/vmd/plugins/molfile/>
 
 * numpy 
 * cmake >2.8.12
+* swig >3.0
+* tng_io (install with pymolfile setup)
 * NetCDF (Optional)
 * Expat (Optional)
 * Babel (Optional)