diff --git a/Makefile b/Makefile
index a2e419279..cf0d14ef8 100644
--- a/Makefile
+++ b/Makefile
@@ -20,11 +20,14 @@ all:  # vendor-deps $(SRC) $(OTHER_DEPS)
 mypy:
 	-mypy $(PYTHON_SOURCES)
 
-format: black clang-format
+format: black isort clang-format
 
 clang-format:
 	-clang-format -i $(C_SOURCES) --style=google
 
+isort:
+	-isort $(PYTHON_SOURCES)
+
 black:
 	-black -l 79 $(PYTHON_SOURCES)