diff --git a/build.gradle b/build.gradle
index 772885e..ba63d56 100644
--- a/build.gradle
+++ b/build.gradle
@@ -20,6 +20,7 @@ allprojects {
 }
 
 kotlin {
+    jvmToolchain(21)
     sourceSets {
         commonTest {
             dependencies {
@@ -30,7 +31,6 @@ kotlin {
         }
     }
     jvm {
-        jvmToolchain(21)
         withJava()
         compilations.main {
             Action<KotlinJvmCompilerOptions> action = { KotlinJvmCompilerOptions kjco ->
diff --git a/gradle.properties b/gradle.properties
index 9388921..c29c732 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,7 +1,11 @@
+org.gradle.configuration-cache=false
+org.gradle.parallel=true
+org.gradle.caching=true
+
 kotlin.code.style=official
 kotlin.jvm.target.validation.mode=ignore
 
 gitea.maven.url = https://gitea.woggioni.net/api/packages/woggioni/maven
 
-klevtree.version = 2024.04.05
-lys.version = 2024.04.04
+klevtree.version = 2025.03.11
+lys.version = 2025.03.08
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index a80b22c..37f853b 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/gradlew.bat b/gradlew.bat
index 93e3f59..25da30d 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -43,11 +43,11 @@ set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
 if %ERRORLEVEL% equ 0 goto execute
 
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -57,11 +57,11 @@ set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
 if exist "%JAVA_EXE%" goto execute
 
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail