diff --git a/Makefile b/Makefile
index ce9b71653a0fbd7346d0baf82da1346955f4d77a..6ec8da8eaf4e6f3b7ca3e73e3d35ec3fd9e5aecd 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: docs tests check check-format mypy pylint format build deploy deploy_test
+.PHONY: docs tests check check-format mypy isort pylint format build deploy deploy_test
 .SILENT: deploy deploy_test # do not echo commands with password
 
 # generate documentation
@@ -10,13 +10,16 @@ tests:
 	poetry run python3 -m unittest ${TESTS_FILTER}
 
 # check
-check: mypy pylint check-format
+check: mypy isort pylint check-format
 
 # check static typing
 mypy:
-	 poetry run mypy duniterpy --ignore-missing-imports
-	 poetry run mypy tests --ignore-missing-imports
-	 poetry run mypy examples --ignore-missing-imports
+	poetry run mypy duniterpy --ignore-missing-imports
+	poetry run mypy tests --ignore-missing-imports
+	poetry run mypy examples --ignore-missing-imports
+
+isort:
+	poetry run isort duniterpy tests examples
 
 # check code errors
 pylint: