commit - 730a71f50c224102e5e26481f18a7f2773fd9167
commit + 37fcc2f01565ecba5b08bf3e04cfb7ca4cb51bad
blob - da39b3dd6c7c605c5745234d8a8de9e65d65672e
blob + 1a0e70965e64e6d061bd62e5035363fe8bb88b90
--- swh/loader/git/loader.py
+++ swh/loader/git/loader.py
@@ -80,20 +80,21 @@ class GraphSwapper:
         self.graph = graph
         self.f = swapfile
         self.offset = -1
+        self.graph_storage_format = "pickle"
 
     def swap_out(self):
         if self.offset != -1:
             return
         self.f.seek(0, io.SEEK_END)
         self.offset = self.f.tell()
-        self.graph.write_pickle(self.f)
+        self.graph.write(self.f, format=self.graph_storage_format)
         del self.graph
 
     def swap_in(self):
         if self.offset == -1:
             raise ValueError("graph has not been swapped out")
         self.f.seek(self.offset, io.SEEK_SET)
-        return Graph.Read_Pickel(self.f)
+        return Graph.Read(self.f, format=self.graph_storage_format)
 
 
 def split_lines_and_remainder(buf: bytes) -> Tuple[List[bytes], bytes]: