diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index bf19ade..ed1eb10 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -3,9 +3,11 @@
 # certain platforms or Java versions, and provides a first line of defence
 # against bad commits.
 
-name: build
+name: CI
+
 on:
   push:
+    branches: [main]
     tags-ignore:
       - "**"
   pull_request:
@@ -14,6 +16,8 @@ on:
 
 jobs:
   build:
+    name: Build
+
     strategy:
       matrix:
         # Use these Java versions
@@ -24,30 +28,32 @@ jobs:
         os: [ubuntu-latest, windows-latest]
 
     runs-on: ${{ matrix.os }}
+
     steps:
-      - name: checkout repository
-        uses: actions/checkout@v3
+      - name: Checkout repository
+        uses: actions/checkout@v4
 
-      - name: validate gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
+      - name: Validate Gradle wrapper
+        uses: gradle/actions/wrapper-validation@v3
 
-      - name: setup jdk ${{ matrix.java }}
-        uses: actions/setup-java@v3
+      - name: Setup JDK ${{ matrix.java }}
+        uses: actions/setup-java@v4
         with:
           distribution: "temurin"
           java-version: ${{ matrix.java }}
           cache: "gradle"
 
-      - name: make gradle wrapper executable
+      - name: Make Gradle wrapper executable
         if: ${{ runner.os != 'Windows' }}
         run: chmod +x ./gradlew
 
-      - name: build
+      - name: Build
         run: ./gradlew build
 
-      - name: capture build artifacts
+      - name: Capture build artifacts
         if: ${{ runner.os == 'Linux' && matrix.java == '21' }} # Only upload artifacts built from latest java on one OS
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
-          name: Artifacts
+          name: jars
           path: build/libs/
+          if-no-files-found: error
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 05bc4c8..10dedb3 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -1,4 +1,5 @@
-name: release
+name: Release
+
 on:
   push:
     tags:
@@ -12,15 +13,18 @@ jobs:
     uses: ./.github/workflows/build.yml
 
   make-release:
-    runs-on: ubuntu-latest
+    name: Create release
     needs: build
 
+    runs-on: ubuntu-latest
+
     steps:
-      - uses: actions/download-artifact@v3
+      - name: Download artifacts 
+        uses: actions/download-artifact@v4
         with:
-          name: Artifacts
+          name: jars
 
-      - name: create release
+      - name: Create Release
         uses: softprops/action-gh-release@v1
         with:
           draft: true
diff --git a/flake.lock b/flake.lock
deleted file mode 100644
index 1ec4784..0000000
--- a/flake.lock
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-  "nodes": {
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1688231357,
-        "narHash": "sha256-ZOn16X5jZ6X5ror58gOJAxPfFLAQhZJ6nOUeS4tfFwo=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "645ff62e09d294a30de823cb568e9c6d68e92606",
-        "type": "github"
-      },
-      "original": {
-        "id": "nixpkgs",
-        "ref": "nixos-unstable",
-        "type": "indirect"
-      }
-    },
-    "root": {
-      "inputs": {
-        "nixpkgs": "nixpkgs"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}
diff --git a/flake.nix b/flake.nix
deleted file mode 100644
index 73fe54d..0000000
--- a/flake.nix
+++ /dev/null
@@ -1,37 +0,0 @@
-{
-  description = "Improve and tweak Minecraft CPU scheduling (again!)";
-
-  inputs = {
-    nixpkgs.url = "nixpkgs/nixos-unstable";
-  };
-
-  outputs = {nixpkgs, ...}: let
-    systems = [
-      "x86_64-linux"
-      "aarch64-linux"
-      "x86_64-darwin"
-      "aarch64-darwin"
-    ];
-
-    forAllSystems = nixpkgs.lib.genAttrs systems;
-    nixpkgsFor = forAllSystems (system: import nixpkgs {inherit system;});
-
-    forEachSystem = fn:
-      forAllSystems (system:
-        fn {
-          inherit system;
-          pkgs = nixpkgsFor.${system};
-        });
-  in {
-    devShells = forEachSystem ({pkgs, ...}: {
-      default = pkgs.mkShell {
-        packages = with pkgs; [
-          jdk17_headless
-          gradle_7
-        ];
-      };
-    });
-
-    formatter = forEachSystem ({pkgs, ...}: pkgs.alejandra);
-  };
-}
diff --git a/gradle.properties b/gradle.properties
index 261a637..d51de6e 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -3,19 +3,19 @@ org.gradle.jvmargs=-Xmx1G
 
 # Fabric Properties
 # check these on https://fabricmc.net/develop/
-minecraft_version=1.20.6
-yarn_mappings=1.20.6+build.1
+minecraft_version=1.21
+yarn_mappings=1.21+build.9
 loader_version=0.15.11
 
-#Fabric api
-fabric_version=0.98.0+1.20.6
+# Fabric API
+fabric_version=0.100.7+1.21
 
 # Mod Properties
-mod_version=0.1.3
+mod_version=0.1.4
 mod_id=threadtweak
 mod_desc=Improve and tweak Minecraft CPU scheduling (again!)
 maven_group=com.github.getchoo
 
 # Dependencies
 # currently not on the main fabric site, check on the maven: https://maven.fabricmc.net/net/fabricmc/fabric-api/fabric-api
-mod_menu_version=10.0.0-beta.1
+mod_menu_version=11.0.1
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..4026330
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,16 @@
+{
+  pkgs ? import nixpkgs {
+    inherit system;
+    config = { };
+    overlays = [ ];
+  },
+  lib ? pkgs.lib,
+  nixpkgs ? <nixpkgs>,
+  system ? builtins.currentSystem,
+}:
+pkgs.mkShellNoCC {
+  packages = [
+    pkgs.jdk21_headless
+    pkgs.gradle_8
+  ];
+}
diff --git a/src/main/resources/fabric.mod.json b/src/main/resources/fabric.mod.json
index 8ef3220..5423b32 100644
--- a/src/main/resources/fabric.mod.json
+++ b/src/main/resources/fabric.mod.json
@@ -23,7 +23,7 @@
   "depends": {
     "fabricloader": ">=0.15",
     "fabric-api": "*",
-    "minecraft": "~1.20.5",
+    "minecraft": "~1.21",
     "java": ">=21"
   }
 }