diff --git a/Makefile b/Makefile
index f6ad8cc..d0ae384 100644
--- a/Makefile
+++ b/Makefile
@@ -27,10 +27,7 @@ mypy-host:
 mypy-container:
 	mypy $(MYPY_ARGS) container
 
-mypy-dev-scripts:
-	mypy $(MYPY_ARGS) install dev_scripts/* *.py
-
-mypy: mypy-host  mypy-container # mypy-dev-scripts ## check type hints with mypy
+mypy: mypy-host  mypy-container ## check type hints with mypy
 
 .PHONY: lint
 lint: lint-black lint-isort mypy ## check the code with various linters
diff --git a/container/dangerzone.py b/container/dangerzone.py
index 3f55340..a8ed3a7 100644
--- a/container/dangerzone.py
+++ b/container/dangerzone.py
@@ -379,7 +379,7 @@ class DangerzoneConverter:
                     png_filename,
                     ocr_filename,
                     "-l",
-                    os.environ.get("OCR_LANGUAGE"), # type: ignore
+                    os.environ.get("OCR_LANGUAGE"),  # type: ignore
                     "--dpi",
                     "70",
                     "pdf",