diff --git a/repos.json.lock b/repos.json.lock
index 3d4f0826e..7f0cfad7e 100644
--- a/repos.json.lock
+++ b/repos.json.lock
@@ -11,8 +11,8 @@
             "url": "https://gricad-gitlab.univ-grenoble-alpes.fr/Projets-INFO4/18-19/19/code"
         },
         "arc": {
-            "rev": "b71d07a808e6637734164050601aa6dad7d85e1f",
-            "sha256": "0srjmbi4srmsbnjjy0cgcwi1z0292xfvklb279r41p83n82b9b8z",
+            "rev": "482a68858e4b2c6f6937173157d46f43b3d7976b",
+            "sha256": "0k4g5v4l4hkli568mlckys025a2q29nrh46bihhwah0ygdffh1gv",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "bb010g": {