diff --git a/.github/workflows/dev-build.yml b/.github/workflows/dev-build.yml
index 64b032c..51e0c10 100644
--- a/.github/workflows/dev-build.yml
+++ b/.github/workflows/dev-build.yml
@@ -11,10 +11,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'zulu'
         
       - name: Setup Gradle
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 0c723e8..19881cf 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,10 +12,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'zulu'
         
       - name: Setup Gradle
diff --git a/build.gradle.kts b/build.gradle.kts
index 8c6ab81..0008747 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -35,7 +35,7 @@ dependencies {
     compileOnly("com.github.Elikill58:Negativity:2.7.1")
     //other dependencies
     implementation("com.moandjiezana.toml:toml4j:0.7.2")
-    compileOnly("org.leavesmc.leaves:leaves-api:1.20.6-R0.1-SNAPSHOT")
+    compileOnly("org.leavesmc.leaves:leaves-api:1.21-R0.1-SNAPSHOT")
     implementation("dev.jorel:commandapi-bukkit-shade-mojang-mapped:${commandAPIVer}")
     implementation("dev.jorel:commandapi-bukkit-kotlin:${commandAPIVer}")
     implementation("org.jetbrains.kotlin:kotlin-stdlib:1.9.0")