diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e82daa9..c35a501 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,7 +33,7 @@ jobs:
           # stop the build if there are Python syntax errors or undefined names
           flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
           # the GitHub editor is 127 chars wide
-          flake8 . --count --max-complexity=14 --max-line-length=127 --statistics
+          flake8 . --count --max-complexity=18 --max-line-length=127 --statistics
       - name: Test with pytest
         run: python -m pytest ./tests