diff --git a/.nix/sources.json b/.nix/sources.json
index 6f0ba13c..84cee686 100644
--- a/.nix/sources.json
+++ b/.nix/sources.json
@@ -5,10 +5,10 @@
         "homepage": "https://github.com/nmattia/niv",
         "owner": "nmattia",
         "repo": "niv",
-        "rev": "82e5cd1ad3c387863f0545d7591512e76ab0fc41",
-        "sha256": "090l219mzc0gi33i3psgph6s2pwsc8qy4lyrqjdj4qzkvmaj65a7",
+        "rev": "351d8bc316bf901a81885bab5f52687ec8ccab6e",
+        "sha256": "1yzhz7ihkh6p2sxhp3amqfbmm2yqzaadqqii1xijymvl8alw5rrr",
         "type": "tarball",
-        "url": "https://github.com/nmattia/niv/archive/82e5cd1ad3c387863f0545d7591512e76ab0fc41.tar.gz",
+        "url": "https://github.com/nmattia/niv/archive/351d8bc316bf901a81885bab5f52687ec8ccab6e.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs": {
@@ -29,10 +29,10 @@
         "homepage": "",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "9e319dd18f7beadab4daaf2426466d4023c1d26f",
-        "sha256": "0fizgamhrypmmkxzhd02r7j7151d03xsxcsw7135py836x6fmq62",
+        "rev": "cf668f737ac986c0a89e83b6b2e3c5ddbd8cf33b",
+        "sha256": "0xaswxxjkx5fjjl1c7gp27qajvpl9qsi0rmj044hhmjrrlpb6nvd",
         "type": "tarball",
-        "url": "https://github.com/oxalica/rust-overlay/archive/9e319dd18f7beadab4daaf2426466d4023c1d26f.tar.gz",
+        "url": "https://github.com/oxalica/rust-overlay/archive/cf668f737ac986c0a89e83b6b2e3c5ddbd8cf33b.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }