diff --git a/requirements.txt b/requirements.txt
index d1e761e..c5a4a8c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,8 +17,8 @@ pymongo>=4.2.0
 # csv
 pandas>=1.4.3
 # snt
-xmltodict~=
-tabulate>=0.8.10
+xmltodict<=0.13.0
+tabulate>=0.8.10,<=0.9.0
 python-gitlab
 pypandoc>=1.11
 pydantic >= 2.3.0, < 2.8.0
diff --git a/setup.cfg b/setup.cfg
index 761205e..711e03f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -32,35 +32,35 @@ install_requires =
     pyyaml > 6.0  # 5.4 does not work with python 3.11!
     xarray >= 2022.3.0
     pint == 0.21.1  # pint >= 0.19.2<0.22.0 Note: 0.22.0 shows bad str-output for quantities with format Lx~
-    pint_xarray # >= 0.2.1
-    regex # >= 2023
+    pint_xarray >= 0.2.1
+    regex>=2020.7.9
     packaging
     ontolutils>=0.2.20
-    python-forge # == 18.6.0
+    python-forge == 18.6.0
     requests
     pydantic >= 2.3.0, < 2.8.0
     rdflib<=7.0.0
 
 [options.extras_require]
 database=
-    pymongo # >= 4.2.0
+    pymongo>=4.2.0
 layout_validation=
-    tabulate
+    tabulate>=0.8.10,<=0.9.0
 csv =
-    pandas # >= 1.4.3
+    pandas >= 1.4.3
 snt =
-    xmltodict
-    tabulate # >= 0.8.10
+    xmltodict<=0.13.0
+    tabulate>=0.8.10,<=0.9.0
     python-gitlab
-    pypandoc # >= 1.11
+    pypandoc >= 1.11
 gui =
-    PyQt5
+    PyQt5==5.15.10
 test =
     pytest >= 7.1.2
     pytest-cov
     pylint
     mongomock == 4.1.2
-    xmltodict
+    xmltodict<=0.13.0
     scipy  # provides netcdf4
     %(csv)s
     %(snt)s