diff --git a/flake.lock b/flake.lock
index 7c05f66..feeef4e 100644
--- a/flake.lock
+++ b/flake.lock
@@ -36,11 +36,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1703034876,
-        "narHash": "sha256-4bMPFv/bs5g1nEsXQwXlrAGJgjv1Ilr0ejdaTkBwQLs=",
+        "lastModified": 1703351344,
+        "narHash": "sha256-9FEelzftkE9UaJ5nqxidaJJPEhe9TPhbypLHmc2Mysc=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "312ab59e8ade69e6083017bd9b98a2919f1fb86a",
+        "rev": "7790e078f8979a9fcd543f9a47427eeaba38f268",
         "type": "github"
       },
       "original": {
@@ -68,11 +68,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1703384182,
-        "narHash": "sha256-g5K8bFBCIQ3x/j/MFTpkZo4It5SGWPwhBp/lASiy+pA=",
+        "lastModified": 1703902408,
+        "narHash": "sha256-qXdWvu+tlgNjeoz8yQMRKSom6QyRROfgpmeOhwbujqw=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "cb6395cb3c2f69ad028914c90bce833e51d339c9",
+        "rev": "319f57cd2c34348c55970a4bf2b35afe82088681",
         "type": "github"
       },
       "original": {
diff --git a/templates/rust/flake.nix b/templates/rust/flake.nix
index 455a8df..a177ab1 100644
--- a/templates/rust/flake.nix
+++ b/templates/rust/flake.nix
@@ -10,7 +10,7 @@
     supportedSystems = [ "x86_64-linux" ];
 
     # Rust nightly version.
-    nightlyVersion = "2023-12-24";
+    nightlyVersion = "2023-12-30";
   in mars-std.lib.eachSystem supportedSystems (system: let
     pkgs = mars-std.legacyPackages.${system};