diff --git a/README.md b/README.md
index bac46ce..fa9d5d9 100644
--- a/README.md
+++ b/README.md
@@ -162,9 +162,9 @@ See the [LICENSE](LICENSE) file for details.
 
 [^1]: _cfr._ `date` command takes ≈ `931 ms` when iterating over ≈ 600
     entries. Measured with [`hyperfine`].
-[^2]: _IEEE Std 1003.1-2017: Standard for Information Technology
+[^2]: _IEEE Std 1003.1-2024: Standard for Information Technology
     — Portable Operating System Interface (POSIX®)_, \
-    ISO/IEC/IEEE 9945:2009/COR 2:2017. URL: https://pubs.opengroup.org/onlinepubs/9699919799/
+    ISO/IEC DIS 9945. URL: https://pubs.opengroup.org/onlinepubs/9799919799/
 [^3]: _ISO/IEC 9899: Standard for Information Technology
     — Programming languages — C_, ISO/IEC 9899:2023. \
     URL: https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3096.pdf