diff --git a/pyproject.toml b/pyproject.toml
index 0fac0fda..e4f98d43 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "vtlengine"
-version = "1.6.0"
+version = "1.6.1rc1"
 description = "Run and Validate VTL Scripts"
 license = "AGPL-3.0"
 readme = "README.md"
diff --git a/src/vtlengine/__init__.py b/src/vtlengine/__init__.py
index a611948d..0c1b1bbc 100644
--- a/src/vtlengine/__init__.py
+++ b/src/vtlengine/__init__.py
@@ -24,4 +24,4 @@
     "validate_external_routine",
 ]
 
-__version__ = "1.6.0"
+__version__ = "1.6.1rc1"