diff --git a/.allowed-licenses b/.allowed-licenses
index 995a54f..1093263 100644
--- a/.allowed-licenses
+++ b/.allowed-licenses
@@ -10,6 +10,10 @@ Apache Software License, BSD License
 BSD
 BSD License
 
+# Variants of the ISC License
+ISCL
+ISC License (ISCL)
+
 # Variants of the LGPL
 GNU Library or Lesser General Public License (LGPL)
 LGPL
diff --git a/.circleci/config.yml b/.circleci/config.yml
index d493b31..f8f20eb 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -31,8 +31,8 @@ jobs:
           command: |
             if [ -z "<< pipeline.git.base_revision >>" ]; then
               echo "No previous build, run license check by default."
-            elif git diff-tree --no-commit-id --name-only -r << pipeline.git.revision >> << pipeline.git.base_revision >> | grep py<< parameters.python-version >>-requirements.txt ; then
-              echo "Changes in py<< parameters.python-version >>-requirements.txt, run license check."
+            elif git diff-tree --no-commit-id --name-only -r << pipeline.git.revision >> << pipeline.git.base_revision >> | grep ".allowed-licenses\|py<< parameters.python-version >>-requirements.txt" ; then
+              echo "Changes in .allowed-licenses or py<< parameters.python-version >>-requirements.txt, run license check."
             else
               echo "No relevant changes found, skip running license check."
               circleci-agent step halt
@@ -56,6 +56,10 @@ workflows:
   all-tests:
     jobs:
       - test:
-          <<: *version-matrix
+          matrix:
+            parameters:
+              python-version: ["3.5", "3.6", "3.7", "3.8", "3.9"]
       - license-scan:
-          <<: *version-matrix
+          matrix:
+            parameters:
+              python-version: [ "3.6", "3.7", "3.8", "3.9" ]