diff --git a/nix/sources.json b/nix/sources.json
index 8177237..3cb4d8a 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -29,10 +29,10 @@
         "homepage": "",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b94726217f7cdc02ddf277b65553762d520da196",
-        "sha256": "1v3v7f2apmsdwv1w6hvsxr8whggjbiaxy00k47pxdzyigxv3s400",
+        "rev": "647cc06986c1ae4a2bb05298e0cf598723e42970",
+        "sha256": "1n1sd5lbds08vxy8x9l94w0z8bbq39fh2rrr6mnq0rmhf4xb2mj1",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/b94726217f7cdc02ddf277b65553762d520da196.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/647cc06986c1ae4a2bb05298e0cf598723e42970.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs-unstable": {
@@ -53,10 +53,10 @@
         "homepage": "",
         "owner": "cachix",
         "repo": "pre-commit-hooks.nix",
-        "rev": "1b11ce0f8c65dd3d8e9520e23c100b76d09a858b",
-        "sha256": "0l2v8hsxrvj8w335xxxln49rpd9z5ncv6bl2wnk65zzzd4wa5rkm",
+        "rev": "d16e007e6bd263ba5899a9a425d76a78906570cd",
+        "sha256": "1c0lv3yzq1kkqm4j37wl5hlawlsrj1413vkr1mdm661klad2sa0d",
         "type": "tarball",
-        "url": "https://github.com/cachix/pre-commit-hooks.nix/archive/1b11ce0f8c65dd3d8e9520e23c100b76d09a858b.tar.gz",
+        "url": "https://github.com/cachix/pre-commit-hooks.nix/archive/d16e007e6bd263ba5899a9a425d76a78906570cd.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }