diff --git a/flake.lock b/flake.lock
index bdc9dd0..73f7180 100644
--- a/flake.lock
+++ b/flake.lock
@@ -80,17 +80,17 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1688092301,
-        "narHash": "sha256-NTgT955DzXWVjHsuBn1t2K0x4hUghY7uE1jG2nGL5R4=",
+        "lastModified": 1703902408,
+        "narHash": "sha256-qXdWvu+tlgNjeoz8yQMRKSom6QyRROfgpmeOhwbujqw=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "4c31223801dd0f28ac15d60f2e5ddbd4d51ce17a",
+        "rev": "319f57cd2c34348c55970a4bf2b35afe82088681",
         "type": "github"
       },
       "original": {
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "4c31223801dd0f28ac15d60f2e5ddbd4d51ce17a",
+        "rev": "319f57cd2c34348c55970a4bf2b35afe82088681",
         "type": "github"
       }
     },
diff --git a/flake.nix b/flake.nix
index 5ee5746..1c57853 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,7 +3,7 @@
   inputs = {
     nixpkgs.url = "nixpkgs/nixos-22.11";
     flake-utils.url = "github:numtide/flake-utils";
-    rust-overlay.url = "github:oxalica/rust-overlay/4c31223801dd0f28ac15d60f2e5ddbd4d51ce17a";  #< 2023-06-30 (TODO: update/un- pin)
+    rust-overlay.url = "github:oxalica/rust-overlay/319f57cd2c34348c55970a4bf2b35afe82088681";  #< 2023-12-30 (TODO: update/un- pin)
   };
 
   outputs = { self, nixpkgs, flake-utils, rust-overlay }: