diff --git a/clippy.toml b/clippy.toml
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+# Temporary mitigation for the `time` advisory flagged by Dependabot.
+# We cannot take `time` 0.3.47 yet because that upgrade needs Rust 1.88, so
+# until our Rust MSRV moves from 1.85 to 1.88 we ban the affected `Rfc2822`
+# format description in our own code. Remove this once we can bump `time` to
+# 0.3.47 or newer.
+disallowed-types = ["time::format_description::well_known::Rfc2822"]