diff --git a/flake.lock b/flake.lock
index 93256de8..202bb8a5 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,12 +2,12 @@
   "nodes": {
     "flake-schemas": {
       "locked": {
-        "lastModified": 1721078157,
-        "narHash": "sha256-c2AZH9cOnSpPXV8Lwy19/I8EgW7G+E+Zh6YQBZZwzxI=",
-        "rev": "29e53dd33b1a38f235ef073e768c62821cb6146e",
-        "revCount": 66,
+        "lastModified": 1721999734,
+        "narHash": "sha256-G5CxYeJVm4lcEtaO87LKzOsVnWeTcHGKbKxNamNWgOw=",
+        "rev": "0a5c42297d870156d9c57d8f99e476b738dcd982",
+        "revCount": 75,
         "type": "tarball",
-        "url": "https://api.flakehub.com/f/pinned/DeterminateSystems/flake-schemas/0.1.3/0190b841-54d3-7b7a-8550-24942bc38caf/source.tar.gz"
+        "url": "https://api.flakehub.com/f/pinned/DeterminateSystems/flake-schemas/0.1.5/0190ef2f-61e0-794b-ba14-e82f225e55e6/source.tar.gz"
       },
       "original": {
         "type": "tarball",
@@ -40,11 +40,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1717050755,
-        "narHash": "sha256-C9IEHABulv2zEDFA+Bf0E1nmfN4y6MIUe5eM2RCrDC0=",
+        "lastModified": 1741396135,
+        "narHash": "sha256-wqmdLr7h4Bk8gyKutgaApJKOM8JVvywI5P48NuqJ9Jg=",
         "owner": "nix-community",
         "repo": "gomod2nix",
-        "rev": "31b6d2e40b36456e792cd6cf50d5a8ddd2fa59a1",
+        "rev": "0983848bf2a7ccbfe24d874065adb8fd0f23729b",
         "type": "github"
       },
       "original": {
@@ -55,12 +55,12 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1721548954,
-        "narHash": "sha256-7cCC8+Tdq1+3OPyc3+gVo9dzUNkNIQfwSDJ2HSi2u3o=",
-        "rev": "63d37ccd2d178d54e7fb691d7ec76000740ea24a",
-        "revCount": 633334,
+        "lastModified": 1741862977,
+        "narHash": "sha256-prZ0M8vE/ghRGGZcflvxCu40ObKaB+ikn74/xQoNrGQ=",
+        "rev": "cdd2ef009676ac92b715ff26630164bb88fec4e0",
+        "revCount": 715614,
         "type": "tarball",
-        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.2405.633334%2Brev-63d37ccd2d178d54e7fb691d7ec76000740ea24a/0190d847-0241-7628-8ab0-d49f442300f4/source.tar.gz"
+        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.2411.715614%2Brev-cdd2ef009676ac92b715ff26630164bb88fec4e0/019590d8-bf83-7849-9c87-9e373480fc07/source.tar.gz"
       },
       "original": {
         "type": "tarball",
diff --git a/flake.nix b/flake.nix
index b44ba7d6..6e896aa1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -111,7 +111,7 @@
         };
 
         # Test harness (TODO: make this a flake as well)
-        durable-promise-test-harness = pkgs.buildGo121Module rec {
+        durable-promise-test-harness = pkgs.buildGo123Module rec {
           name = "durable-promise-test-harness";
           src = pkgs.fetchFromGitHub {
             owner = "resonatehq";