diff --git a/AdaptivePELE/__init__.py b/AdaptivePELE/__init__.py
index 36052bdc..5f4ab4f1 100644
--- a/AdaptivePELE/__init__.py
+++ b/AdaptivePELE/__init__.py
@@ -1,2 +1,2 @@
-__version__ = "1.7.3"
+__version__ = "1.7.4"
 name = "AdaptivePELE"
diff --git a/AdaptivePELE/atomset/SymmetryContactMapEvaluator.pyx b/AdaptivePELE/atomset/SymmetryContactMapEvaluator.pyx
index f60d7234..18a9b57b 100644
--- a/AdaptivePELE/atomset/SymmetryContactMapEvaluator.pyx
+++ b/AdaptivePELE/atomset/SymmetryContactMapEvaluator.pyx
@@ -1,5 +1,5 @@
 from __future__ import unicode_literals
-import atomset
+#import atomset
 import numpy as np
 cimport cython
 cimport numpy as np
diff --git a/AdaptivePELE/atomset/atomset.pyx b/AdaptivePELE/atomset/atomset.pyx
index 7db96380..5b86a3b2 100644
--- a/AdaptivePELE/atomset/atomset.pyx
+++ b/AdaptivePELE/atomset/atomset.pyx
@@ -1,3 +1,4 @@
+# cython: language_level=2
 from __future__ import unicode_literals
 import numpy as np
 import re
diff --git a/AdaptivePELE/freeEnergies/utils.pyx b/AdaptivePELE/freeEnergies/utils.pyx
index 0246be28..4d620745 100644
--- a/AdaptivePELE/freeEnergies/utils.pyx
+++ b/AdaptivePELE/freeEnergies/utils.pyx
@@ -1,3 +1,4 @@
+# cython: language_level=2
 import numpy as np
 from io import open
 cimport cython
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c6d36b32..59592070 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 
 [//] : # ## [1.x] - Unreleased
 
+## [1.7.4] - 2023-09-29
+
+### Bug fixes:
+
+    - Fix compatibility with latest Cython version
+
 ## [1.7.3] - 2023-01-31
 
 ### Bug fixes: