diff --git a/backend/core/migrations/0012_alter_appliedcontrol_updated_at_and_more.py b/backend/core/migrations/0012_alter_appliedcontrol_updated_at_and_more.py
index 23137413d..ee9779bb0 100644
--- a/backend/core/migrations/0012_alter_appliedcontrol_updated_at_and_more.py
+++ b/backend/core/migrations/0012_alter_appliedcontrol_updated_at_and_more.py
@@ -74,7 +74,7 @@ def adapt_libraries(apps, schema_editor):
             "frameworks": library.frameworks.count(),
             "threats": library.threats.count(),
             "reference_controls": library.reference_controls.count(),
-            "risk_matrix": library.risk_matrices.count()
+            "risk_matrix": library.risk_matrices.count(),
         }
         library.save()
 
diff --git a/backend/core/models.py b/backend/core/models.py
index b76629b47..29dc2d536 100644
--- a/backend/core/models.py
+++ b/backend/core/models.py
@@ -149,9 +149,7 @@ def store_library_content(cls, library_content: bytes) -> "StoredLibrary | None"
         locale = library_data.get("locale", "en")
         version = int(library_data["version"])
         is_loaded = LoadedLibrary.objects.filter(
-            urn=urn,
-            locale=locale,
-            version=version
+            urn=urn, locale=locale, version=version
         ).exists()
 
         library_matches = [*StoredLibrary.objects.filter(urn=urn, locale=locale)]
diff --git a/backend/library/views.py b/backend/library/views.py
index a7c1391b2..88ce401ee 100644
--- a/backend/library/views.py
+++ b/backend/library/views.py
@@ -63,17 +63,17 @@ def retrieve(self, request, *args, pk, **kwargs):
         return Response(data)
 
     def content(self, request, pk):
-        try :
+        try:
             lib = StoredLibrary.objects.get(urn=pk)
-        except :
+        except:
             return Response("Library not found.", status=HTTP_404_NOT_FOUND)
         return Response(lib.content)
 
     @action(detail=True, methods=["get"])
     def content(self, request, pk):
-        try :
+        try:
             lib = StoredLibrary.objects.get(urn=pk)
-        except :
+        except:
             return Response("Library not found.", status=HTTP_404_NOT_FOUND)
         return Response(lib.content)
 
@@ -251,9 +251,9 @@ def destroy(self, request, *args, pk, **kwargs):
 
     @action(detail=True, methods=["get"])
     def content(self, request, pk):
-        try :
+        try:
             lib = LoadedLibrary.objects.get(urn=pk)
-        except :
+        except:
             return Response("Library not found.", status=HTTP_404_NOT_FOUND)
         return Response(lib._objects)
 
@@ -261,7 +261,6 @@ def content(self, request, pk):
     def tree(
         self, request, pk
     ):  # We must ensure that users that are not allowed to read the content of libraries can't have any access to them either from the /api/{URLModel/{library_urn}/tree view or the /api/{URLModel}/{library_urn} view.
-
         try:
             lib = LoadedLibrary.objects.get(urn=pk)
         except:
diff --git a/tools/add_builtin.py b/tools/add_builtin.py
index e69afa3a5..cfb10e58e 100644
--- a/tools/add_builtin.py
+++ b/tools/add_builtin.py
@@ -3,24 +3,18 @@
 # This is a temporary tool that adds "builtin: true" to all libraries stored as yaml files under ./backend/library/libraries.
 
 current_path = "/".join(__file__.split("/")[:-1])
-library_path = os.path.join(current_path,"..","backend","library","libraries")
-fnames = [
-	fname for fname in os.listdir(library_path)
-	if fname.endswith(".yaml")
-]
+library_path = os.path.join(current_path, "..", "backend", "library", "libraries")
+fnames = [fname for fname in os.listdir(library_path) if fname.endswith(".yaml")]
 
-for fname in fnames :
-	lib = os.path.join(library_path,fname)
+for fname in fnames:
+    lib = os.path.join(library_path, fname)
 
-	with open(lib,"r",encoding="utf-8") as f:
-		content = f.read()
-	lines = content.split("\n")
+    with open(lib, "r", encoding="utf-8") as f:
+        content = f.read()
+    lines = content.split("\n")
 
-	if not any(
-		re.match(r"^builtin.*:.*true",line) is not None
-		for line in lines
-	) :
-		lines.insert(1,"builtin: true")
-		with open(lib,"w",encoding="utf-8") as f :
-			f.write("\n".join(lines))
-		print(f"Library '{fname}' updated.")
+    if not any(re.match(r"^builtin.*:.*true", line) is not None for line in lines):
+        lines.insert(1, "builtin: true")
+        with open(lib, "w", encoding="utf-8") as f:
+            f.write("\n".join(lines))
+        print(f"Library '{fname}' updated.")