diff --git a/java/patchbukkit/build.gradle.kts b/java/patchbukkit/build.gradle.kts
index 13169ee..518479c 100644
--- a/java/patchbukkit/build.gradle.kts
+++ b/java/patchbukkit/build.gradle.kts
@@ -47,7 +47,7 @@ repositories {
 dependencies {
     implementation("io.papermc.paper:paper-api:26.2.build.87-stable")
     implementation("net.sf.jopt-simple:jopt-simple:6.0-alpha-3")
-    implementation("io.github.astonbitecode:j4rs:0.25.0")
+    implementation("io.github.astonbitecode:j4rs:0.25.2")
     implementation("org.apache.maven:maven-resolver-provider:3.9.6")
     implementation("org.apache.maven.resolver:maven-resolver-impl:1.9.18")
     implementation("org.apache.maven.resolver:maven-resolver-connector-basic:1.9.18")
diff --git a/rust/build/java.rs b/rust/build/java.rs
index 13ed36e..9db97f7 100644
--- a/rust/build/java.rs
+++ b/rust/build/java.rs
@@ -1,6 +1,6 @@
 use std::{fs, path::PathBuf};
 
-use j4rs::{JvmBuilder, LocalJarArtifact, MavenArtifactRepo, MavenSettings};
+use j4rs::{JvmBuilder, MavenArtifactRepo, MavenSettings};
 
 pub fn setup_java(base: PathBuf) {
     let resources = base.join("resources");
@@ -16,16 +16,37 @@ pub fn setup_java(base: PathBuf) {
         .join("libs")
         .join("patchbukkit.jar");
 
-    let jvm = JvmBuilder::new()
+    let jassets = resources.join("jassets");
+    let mut classpath_entries = Vec::new();
+
+    if let Ok(entries) = fs::read_dir(&jassets) {
+        for entry in entries.flatten() {
+            let path = entry.path();
+            if let Some(filename) = path.file_name().and_then(|n| n.to_str()) {
+                if filename.starts_with("j4rs") && filename.ends_with(".jar") {
+                    classpath_entries.push(j4rs::ClasspathEntry::new(&path));
+                }
+            }
+        }
+    }
+
+    let mut jvm_builder = JvmBuilder::new();
+    let mut jvm_builder = jvm_builder
         .with_maven_settings(MavenSettings::new(vec![MavenArtifactRepo::from(
             "papermc::https://repo.papermc.io/repository/maven-public/",
         )]))
         .skip_setting_native_lib()
-        .with_base_path(resources)
+        .with_base_path(&resources)
         .java_opts(vec![
             j4rs::JavaOpt::new("--enable-native-access=ALL-UNNAMED"),
             j4rs::JavaOpt::new("-Dcom.google.protobuf.useUnsafe=false"),
-        ])
+        ]);
+
+    for entry in classpath_entries {
+        jvm_builder = jvm_builder.classpath_entry(entry);
+    }
+
+    let _jvm = jvm_builder
         .build()
         .map_err(|err| format!("jvm failed to init: {err:?}"))
         .unwrap();
@@ -36,7 +57,10 @@ pub fn setup_java(base: PathBuf) {
         );
     }
 
-    jvm.deploy_artifact(&LocalJarArtifact::new(&patchbukkit_jar.to_string_lossy()))
+    fs::create_dir_all(&jassets).unwrap();
+    let dest_jar = jassets.join("patchbukkit.jar");
+    fs::copy(&patchbukkit_jar, &dest_jar)
+        .map_err(|err| format!("Failed to copy patchbukkit.jar to jassets: {err:?}"))
         .unwrap();
 
     let cdylib = std::env::var("CARGO_CDYLIB_FILE_J4RS").unwrap();
diff --git a/rust/src/java/jvm/worker.rs b/rust/src/java/jvm/worker.rs
index 350618d..80c6029 100644
--- a/rust/src/java/jvm/worker.rs
+++ b/rust/src/java/jvm/worker.rs
@@ -209,13 +209,31 @@ impl JvmWorker {
     fn initialize_jvm(&mut self, j4rs_path: &PathBuf) -> anyhow::Result<()> {
         tracing::info!("Initializing JVM with path: {j4rs_path:?}");
 
-        let jvm = JvmBuilder::new()
-            .with_base_path(j4rs_path)
-            .java_opts(vec![
-                j4rs::JavaOpt::new("--enable-native-access=ALL-UNNAMED"),
-                j4rs::JavaOpt::new("-Dcom.google.protobuf.useUnsafe=false"),
-            ])
-            .build()?;
+        let jassets = j4rs_path.join("jassets");
+        let mut classpath_entries = Vec::new();
+
+        if let Ok(entries) = std::fs::read_dir(&jassets) {
+            for entry in entries.flatten() {
+                let path = entry.path();
+                if let Some(filename) = path.file_name().and_then(|n| n.to_str()) {
+                    if filename.starts_with("j4rs") && filename.ends_with(".jar") {
+                        classpath_entries.push(j4rs::ClasspathEntry::new(&path));
+                    }
+                }
+            }
+        }
+
+        let mut jvm_builder = JvmBuilder::new();
+        let mut jvm_builder = jvm_builder.with_base_path(j4rs_path).java_opts(vec![
+            j4rs::JavaOpt::new("--enable-native-access=ALL-UNNAMED"),
+            j4rs::JavaOpt::new("-Dcom.google.protobuf.useUnsafe=false"),
+        ]);
+
+        for entry in classpath_entries {
+            jvm_builder = jvm_builder.classpath_entry(entry);
+        }
+
+        let jvm = jvm_builder.build()?;
 
         initialize_callbacks(&jvm)?;