diff --git a/nix/sources.json b/nix/sources.json
index 76ccad6..917317c 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -17,10 +17,10 @@
         "homepage": null,
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "a45f68ccac476dc37ddf294530538f2f2cce5a92",
-        "sha256": "0i19mrky9m73i601hczyfk25qqyr3j75idb72imdz55szc4vavzc",
+        "rev": "840c782d507d60aaa49aa9e3f6d0b0e780912742",
+        "sha256": "14q3kvnmgz19pgwyq52gxx0cs90ddf24pnplmq33pdddbb6c51zn",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/a45f68ccac476dc37ddf294530538f2f2cce5a92.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/840c782d507d60aaa49aa9e3f6d0b0e780912742.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }