diff --git a/crates/im-rc/RUSTSEC-0000-0000.md b/crates/im-rc/RUSTSEC-0000-0000.md
new file mode 100644
index 000000000..e7e6a85e5
--- /dev/null
+++ b/crates/im-rc/RUSTSEC-0000-0000.md
@@ -0,0 +1,21 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "im-rc"
+date = "2021-05-02"
+url = "https://github.com/bodil/im-rs/issues/185"
+informational = "unmaintained"
+
+[versions]
+patched = []
+unaffected = ["> 15.0.0"]
+```
+
+# im-rc is unmaintained
+
+The author of the `im-rc` crate is unresponsive.
+
+Maintained alternatives:
+
+- [`rpds`](https://github.com/orium/rpds)
+
diff --git a/crates/im/RUSTSEC-0000-0000.md b/crates/im/RUSTSEC-0000-0000.md
new file mode 100644
index 000000000..473180331
--- /dev/null
+++ b/crates/im/RUSTSEC-0000-0000.md
@@ -0,0 +1,21 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "im"
+date = "2021-05-02"
+url = "https://github.com/bodil/im-rs/issues/185"
+informational = "unmaintained"
+
+[versions]
+patched = []
+unaffected = ["> 15.0.0"]
+```
+
+# im is unmaintained
+
+The author of the `im` crate is unresponsive.
+
+Maintained alternatives:
+
+- [`rpds`](https://github.com/orium/rpds)
+