diff --git a/pkgs/os-specific/linux/kernel/hardened-patches.json b/pkgs/os-specific/linux/kernel/hardened-patches.json
index 45d95ba3ec4..464e83c1dee 100644
--- a/pkgs/os-specific/linux/kernel/hardened-patches.json
+++ b/pkgs/os-specific/linux/kernel/hardened-patches.json
@@ -14,6 +14,11 @@
         "url": "https://github.com/anthraxx/linux-hardened/releases/download/5.4.32.a/linux-hardened-5.4.32.a.patch",
         "version_suffix": "NixOS-a"
     },
+    "5.5.18": {
+        "sha256": "0v7vla784sf1fk6d8qa5x8hkyhjb1jkw4lxxcgvvlqbmxl8md8ld",
+        "url": "https://github.com/anthraxx/linux-hardened/releases/download/5.5.18.a/linux-hardened-5.5.18.a.patch",
+        "version_suffix": "a"
+    },
     "5.6.5": {
         "sha256": "19cdpygm5zx3szxl456lfjg5sffqcmn18470wv7prm8rf6liqdj3",
         "url": "https://github.com/anthraxx/linux-hardened/releases/download/5.6.5.a/linux-hardened-5.6.5.a.patch",