diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 9a2a6ca..c4cf844 100755
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,9 @@
 =========
 Changelog
 =========
+Version 1.0.0a6
+===============
+- fixed missing similarity matrix assignment in utils.py
 
 Version 1.0.0a5
 ===============
diff --git a/setup.cfg b/setup.cfg
index 3f38529..3e06b8d 100755
--- a/setup.cfg
+++ b/setup.cfg
@@ -33,7 +33,7 @@ classifiers =
     Programming Language :: Python
 
 #set version manually
-version = 1.0.0a5
+version = 1.0.0a6
 
 [options]
 zip_safe = False
diff --git a/setup.py b/setup.py
index 73bd027..789fa33 100755
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
         #setup(use_scm_version={"version_scheme": "no-guess-dev"})
         #setup(use_scm_version=True, setup_requires=['setuptools_scm'])#{"version_scheme": "post-release", "local_scheme": "node-and-timestamp"})
         setup(name='cia_python',
-              version='1.0.a5',  # manually set the version here
+              version='1.0.a6',  # manually set the version here
               packages=find_packages(),
               install_requires=['seaborn', 'numpy', 'pandas', 'AnnData','scanpy', 'igraph', 'leidenalg']
         )
diff --git a/src/cia/utils.py b/src/cia/utils.py
index e72b94b..2d6300e 100755
--- a/src/cia/utils.py
+++ b/src/cia/utils.py
@@ -90,7 +90,7 @@ def signatures_similarity(signatures_dict, show='J'):
                 similarity = intersec / union
             elif show == '%':
                 similarity = round(100 * intersec / len(signatures_dict[signature_names[i]]), 2)
-            
+            similarity_matrix[i, j] = similarity_matrix[j, i] = similarity    
     similarity = pd.DataFrame(similarity_matrix, index=signature_names, columns=signature_names)
     return similarity