diff --git a/src/csnlp/__init__.py b/src/csnlp/__init__.py
index c286b8a..643eb81 100644
--- a/src/csnlp/__init__.py
+++ b/src/csnlp/__init__.py
@@ -13,7 +13,7 @@
 ==================== =======================================================
 """
 
-__version__ = "1.6.3"
+__version__ = "1.6.4"
 
 __all__ = ["Nlp", "Solution", "multistart", "scaling"]