diff --git a/.travis.yml b/.travis.yml
index 9914625..46791ca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,7 +14,7 @@ install:
   # install kas to have all kas dependencies:
   - pip install .
   # checkcode dependencies:
-  - pip install pycodestyle doc8 Pygments
+  - pip install flake8 pycodestyle doc8 Pygments
   # test dependencies:
   - pip install pytest
 
diff --git a/scripts/checkcode.sh b/scripts/checkcode.sh
index d7638a0..06f16b3 100755
--- a/scripts/checkcode.sh
+++ b/scripts/checkcode.sh
@@ -5,6 +5,9 @@ ERROR=0
 echo "Checking with pycodestyle"
 pycodestyle --ignore=W503,W606 $1/*.py $1/*/*.py || ERROR=$(expr $ERROR + 1)
 
+echo "Checking with flake8"
+flake8 $1 || ERROR=$(expr $ERROR + 2)
+
 echo "Checking with doc8"
 doc8  $1/docs --ignore-path $1/docs/_build || ERROR=$(expr $ERROR + 4)