diff --git a/repos.json.lock b/repos.json.lock
index e9f35b3ee..ec17d150d 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": "c5c6e872bb97102f465dfdda6b5ecd2636ecb157",
-            "sha256": "1i5dr6r7y6lx93092nwcxf1q8k4sayrygi58p1zncbynvfs0bm6w",
+            "rev": "e3a7ca857730c255a5e06675f256d05a69454186",
+            "sha256": "18m02wa1235an8x5ffvg77mv1cfmijbmz63yp7z642b5wqb57y7f",
             "url": "https://github.com/arcnmx/nixexprs"
         },
         "balsoft": {