diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 0b1595a9310..80489a3dc03 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -57,4 +57,7 @@ updates:
       # version, remove it from the ignore list.
       - dependency-name: futures
       - dependency-name: grpcio
+      # Wait with update until https://github.com/Amanieu/intrusive-rs/pull/51
+      # is merged and released, so we can continue using `intrusive_adapter!`
+      # macro in`lru_cache.rs`.
       - dependency-name: intrusive-collections