diff --git a/nix/sources.json b/nix/sources.json
index 79d7ff1..6c196bb 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -49,10 +49,10 @@
         "homepage": "https://github.com/nmattia/niv",
         "owner": "nmattia",
         "repo": "niv",
-        "rev": "e0ca65c81a2d7a4d82a189f1e23a48d59ad42070",
-        "sha256": "1pq9nh1d8nn3xvbdny8fafzw87mj7gsmp6pxkdl65w2g18rmcmzx",
+        "rev": "65a61b147f307d24bfd0a5cd56ce7d7b7cc61d2e",
+        "sha256": "17mirpsx5wyw262fpsd6n6m47jcgw8k2bwcp1iwdnrlzy4dhcgqh",
         "type": "tarball",
-        "url": "https://github.com/nmattia/niv/archive/e0ca65c81a2d7a4d82a189f1e23a48d59ad42070.tar.gz",
+        "url": "https://github.com/nmattia/niv/archive/65a61b147f307d24bfd0a5cd56ce7d7b7cc61d2e.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nix-hexchen": {
@@ -81,10 +81,10 @@
         "homepage": "",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "ebf419e737bb8154b32010a322dcdffbea596443",
-        "sha256": "148l27lnhw1gsi64z8fkx9q7y112dgar99igyswp4aksg7iaqrpf",
+        "rev": "6120ac5cd201f6cb593d1b80e861be0342495be9",
+        "sha256": "04mrjxr1qsdcgcryx7yy72cgcw14c0770gfcgzrdfpnvmjdgbi9i",
         "type": "tarball",
-        "url": "https://github.com/nixos/nixpkgs/archive/ebf419e737bb8154b32010a322dcdffbea596443.tar.gz",
+        "url": "https://github.com/nixos/nixpkgs/archive/6120ac5cd201f6cb593d1b80e861be0342495be9.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs-unstable": {