diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 032f4b2..2667343 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -22,6 +22,15 @@ updates:
     reviewers:
       - "RAprogramm"
     open-pull-requests-limit: 10
+    # `syn` 3 cannot be taken while attribute parsing goes through
+    # darling, whose releases still require `syn` 2 — the two majors do
+    # not coexist in one tree, and the build fails on
+    # `syn::Path: darling::FromMeta is not satisfied`. Upstream tracks
+    # the port in darling#431; drop this entry once a darling release
+    # depends on `syn` 3.
+    ignore:
+      - dependency-name: "syn"
+        versions: ["3.x"]
     groups:
       # Group all minor and patch updates together
       rust-dependencies: