diff --git a/.editorconfig b/.editorconfig
index c6c8b36..2d351db 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,3 +1,5 @@
+# https://editorconfig.org/
+
 root = true
 
 [*]
diff --git a/.envrc b/.envrc
index 3550a30..60db9d3 100644
--- a/.envrc
+++ b/.envrc
@@ -1 +1,3 @@
+# https://direnv.net/
+
 use flake
diff --git a/flake.lock b/flake.lock
index 33e17d1..bfcd46c 100644
--- a/flake.lock
+++ b/flake.lock
@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1690031011,
-        "narHash": "sha256-kzK0P4Smt7CL53YCdZCBbt9uBFFhE0iNvCki20etAf4=",
+        "lastModified": 1691368598,
+        "narHash": "sha256-ia7li22keBBbj02tEdqjVeLtc7ZlSBuhUk+7XTUFr14=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "12303c652b881435065a98729eb7278313041e49",
+        "rev": "5a8e9243812ba528000995b294292d3b5e120947",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index d1c8884..6c996d2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -7,8 +7,5 @@
   outputs = { self, nixpkgs, flake-utils }:
     flake-utils.lib.eachDefaultSystem (system:
       let pkgs = nixpkgs.legacyPackages.${system};
-      in {
-        devShell =
-          pkgs.mkShell { buildInputs = with pkgs; [ julia python3 nodejs ]; };
-      });
+      in { devShell = pkgs.mkShell { buildInputs = with pkgs; [ julia ]; }; });
 }