diff --git a/dune-project b/dune-project
index 3d7638a..74b9906 100644
--- a/dune-project
+++ b/dune-project
@@ -27,7 +27,6 @@ in quantum chemistry.")
   (depends
     (ocaml (>= 4.10))
     (dune  (>= 1.10))
-    str
     lacaml
     getopt
     zarith