diff --git a/flake.lock b/flake.lock
index 837343e..cd4a445 100644
--- a/flake.lock
+++ b/flake.lock
@@ -325,7 +325,8 @@
         "org-yt": "org-yt",
         "php-extras": "php-extras",
         "revealjs": "revealjs",
-        "rotate-text": "rotate-text"
+        "rotate-text": "rotate-text",
+        "sln-mode": "sln-mode"
       }
     },
     "rotate-text": {
@@ -343,6 +344,22 @@
         "repo": "rotate-text.el",
         "type": "github"
       }
+    },
+    "sln-mode": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1423727528,
+        "narHash": "sha256-XqkqPyEJuTtFslOz1fpTf/Klbd/zA7IGpzpmum/MGao=",
+        "owner": "sensorflo",
+        "repo": "sln-mode",
+        "rev": "0f91d1b957c7d2a7bab9278ec57b54d57f1dbd9c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "sensorflo",
+        "repo": "sln-mode",
+        "type": "github"
+      }
     }
   },
   "root": "root",