diff --git a/src/caosadvancedtools/cfood.py b/src/caosadvancedtools/cfood.py
index e79f0373bf4fe8500d0acb4f3c17dff04404d607..8ae016326b745f2da8debbafe06c7a6d4e07e34a 100644
--- a/src/caosadvancedtools/cfood.py
+++ b/src/caosadvancedtools/cfood.py
@@ -46,9 +46,8 @@ from abc import ABCMeta, abstractmethod
 from datetime import datetime
 
 import linkahead as db
-from linkahead.common.models import Entity
 from linkahead.exceptions import (BadQueryError, EmptyUniqueQueryError,
-                                  QueryNotUniqueError, TransactionError)
+                                  QueryNotUniqueError)
 
 from .datamodel_problems import DataModelProblems
 from .guard import global_guard as guard
diff --git a/src/caosadvancedtools/crawler.py b/src/caosadvancedtools/crawler.py
index 7a840624f7287b8292e27c743636df6bbead6d42..e5bdd14271c948e83fc66a3308ff7167db0fe696 100644
--- a/src/caosadvancedtools/crawler.py
+++ b/src/caosadvancedtools/crawler.py
@@ -41,7 +41,6 @@ match. This occurs in basically three steps:
 
 import logging
 import os
-import subprocess
 import traceback
 import uuid
 from datetime import datetime
diff --git a/src/caosadvancedtools/models/parser.py b/src/caosadvancedtools/models/parser.py
index b1e3aa95009c92db5d78471b3b384d9f992a5e1a..a33f37ca716afcf4372994f19132a5255ad1ab77 100644
--- a/src/caosadvancedtools/models/parser.py
+++ b/src/caosadvancedtools/models/parser.py
@@ -36,11 +36,8 @@ Parents can be provided under the 'inherit_from_xxxx' keywords. The value needs
 to be a list with the names. Here, NO NEW entities can be defined.
 """
 import argparse
-import json
-import re
 import sys
 from typing import List, Optional
-from warnings import warn
 
 import jsonref
 import jsonschema
diff --git a/src/caosadvancedtools/pandoc_header_tools.py b/src/caosadvancedtools/pandoc_header_tools.py
index e0e62c8c75c7759338972b274c5c79617347aeeb..bf9b25a9e4ad9a5e9190c41cf00fc4bed6808b4c 100644
--- a/src/caosadvancedtools/pandoc_header_tools.py
+++ b/src/caosadvancedtools/pandoc_header_tools.py
@@ -30,10 +30,7 @@
 # D. Hornung 2019-02
 # T. Fitschen 2019-02
 
-import argparse
-import glob
 import os
-import re
 
 import yaml
 
diff --git a/src/caosadvancedtools/table_converter.py b/src/caosadvancedtools/table_converter.py
index 2f0d4cc9285e43627e75e3971ee41d224254e902..bfbf6296068f761f2cd94c0fcacd1f91756e17c5 100644
--- a/src/caosadvancedtools/table_converter.py
+++ b/src/caosadvancedtools/table_converter.py
@@ -25,7 +25,6 @@ import re
 import sys
 
 import linkahead as db
-import numpy as np
 import pandas as pd
 
 
diff --git a/src/caosadvancedtools/utils.py b/src/caosadvancedtools/utils.py
index 9a0342e991ddd9d7ea5fe907057a1d3d97ecf5ef..3e1e6992d0dcc23d6de04e6753bd322f72728d65 100644
--- a/src/caosadvancedtools/utils.py
+++ b/src/caosadvancedtools/utils.py
@@ -25,7 +25,6 @@
 
 import logging
 import os
-import pathlib
 
 import linkahead as db
 from linkahead.exceptions import TransactionError