diff --git a/units/cache.py b/units/cache.py
index 36603c79a0..d918d19bd0 100644
--- a/units/cache.py
+++ b/units/cache.py
@@ -1,7 +1,9 @@
 
 # https://github.com/python/cpython/issues/90780
 
-from aiocache import cached
+from aiocache import cached  # type: ignore
+# https://github.com/aio-libs/aiocache/issues/512
+# https://github.com/aio-libs/aiocache/issues/667
 from async_lru import alru_cache