diff --git a/README_SETUP.md b/README_SETUP.md
index 43047d554afbe8ffba11aef67b20dde44d29bdcf..daab4707679e30cfecf6f995dfb75f327304cb33 100644
--- a/README_SETUP.md
+++ b/README_SETUP.md
@@ -11,7 +11,7 @@ git clone 'https://gitlab.com/caosdb/caosdb-advanced-user-tools'
 Dependencies will be installed automatically if you use the below described
 procedure.
 - `caosdb>=0.6.0`
-- `openpyxl>=3.0.0`
+- `openpyxl>=3.0.7`
 - `xlrd>=1.2.0`
 - `pandas>=1.2.0`
 - `numpy>=1.17.3`
diff --git a/setup.py b/setup.py
index 39d806c1dcd4abca6f6f2d756d7b9f1e41c4ba95..3f2bb4ff4aee373b2ded8d1f309b5fb5347f1e3c 100755
--- a/setup.py
+++ b/setup.py
@@ -157,7 +157,7 @@ def setup_package():
         install_requires=["caosdb>=0.7.0",
                           "jsonschema>=4.4.0",
                           "numpy>=1.17.3",
-                          "openpyxl>=3.0.0",
+                          "openpyxl>=3.0.7",
                           "pandas>=1.2.0",
                           "xlrd>=2.0",
                           ],
diff --git a/tox.ini b/tox.ini
index ddfb4714f6b86d93e9567fe3c1410f2a1ce965cf..42ff0df986d179ce9770937dba4886f3b4e7ad0f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,7 @@ deps=nose
     pytest
     pytest-cov
     gitignore-parser
-    openpyxl
+    openpyxl >= 3.0.7
     xlrd == 1.2
     h5py
 commands=py.test --cov=caosadvancedtools -vv {posargs}
diff --git a/unittests/test_cfood.py b/unittests/test_cfood.py
index 7055bc7c51962c0cbc487f29bcdacb391218a7d3..62e4b114a1c5cd8f3631f774637f3876c545afd3 100644
--- a/unittests/test_cfood.py
+++ b/unittests/test_cfood.py
@@ -336,6 +336,7 @@ class MealTest(unittest.TestCase):
 
 class FileCacheTest(unittest.TestCase):
     def test(self):
+        # if there is no connection to a server an exception should be raised.
         self.assertRaises(Exception, get_entity_for_path, "/lol")
         FileCrawler(cfood_types=[], files=[db.File(path="/lol")])
         get_entity_for_path("/lol")