diff --git a/spacy/pipeline/_parser_internals/arc_eager.pyx b/spacy/pipeline/_parser_internals/arc_eager.pyx
index ddcc911c8..029e2e29e 100644
--- a/spacy/pipeline/_parser_internals/arc_eager.pyx
+++ b/spacy/pipeline/_parser_internals/arc_eager.pyx
@@ -604,7 +604,7 @@ cdef class ArcEager(TransitionSystem):
                     actions[SHIFT][''] += 1
         if min_freq is not None:
             for action, label_freqs in actions.items():
-                for label, freq in list(label_freqs.items()):
+                for label, freq in label_freqs.copy().items():
                     if freq < min_freq:
                         label_freqs.pop(label)
         # Ensure these actions are present
diff --git a/spacy/vectors.pyx b/spacy/vectors.pyx
index 6d6783af4..1b985a638 100644
--- a/spacy/vectors.pyx
+++ b/spacy/vectors.pyx
@@ -274,7 +274,7 @@ cdef class Vectors:
             self.data = resized_array
         self._sync_unset()
         removed_items = []
-        for key, row in list(self.key2row.items()):
+        for key, row in self.key2row.copy().items():
             if row >= shape[0]:
                 self.key2row.pop(key)
                 removed_items.append((key, row))