diff --git a/.duplicate-id-guard b/.duplicate-id-guard
index d6a072b..03012ff 100644
--- a/.duplicate-id-guard
+++ b/.duplicate-id-guard
@@ -1,3 +1,3 @@
 This file causes merge conflicts if two ID assignment jobs run concurrently.
 This prevents duplicate ID assignment due to a race between those jobs.
-61561327fa802afe2a28b514162e2db87244027b621d6ddbcf39ff4f1b28cfea  -
+61caecc984e285af249201f94b071642be8ca2a8fbea88f70d124dbe3c44f6c3  -
diff --git a/crates/sha2/RUSTSEC-0000-0000.md b/crates/sha2/RUSTSEC-2021-0100.md
similarity index 96%
rename from crates/sha2/RUSTSEC-0000-0000.md
rename to crates/sha2/RUSTSEC-2021-0100.md
index a879138..dc7dc8b 100644
--- a/crates/sha2/RUSTSEC-0000-0000.md
+++ b/crates/sha2/RUSTSEC-2021-0100.md
@@ -1,6 +1,6 @@
 ```toml
 [advisory]
-id = "RUSTSEC-0000-0000"
+id = "RUSTSEC-2021-0100"
 package = "sha2"
 date = "2021-09-08"
 categories = ["crypto-failure"]