diff --git a/.gitignore b/.gitignore
index 92d3420..b523b0e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -155,3 +155,4 @@ gradle-app.setting
 # Custom Ignores
 build.sh
 .env
+bukkit/run
diff --git a/build.gradle.kts b/build.gradle.kts
index 20160c7..b9182b7 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -46,6 +46,12 @@ subprojects {
         processResources {
             expand("version" to rootProject.version)
         }
+
+        register("inspectDependencies") {
+            doLast {
+                inspectDependenciesForProject(project)
+            }
+        }
     }
 }
 
diff --git a/buildSrc/src/main/kotlin/Configurations.kt b/buildSrc/src/main/kotlin/Configurations.kt
index 2355af5..7811ce7 100644
--- a/buildSrc/src/main/kotlin/Configurations.kt
+++ b/buildSrc/src/main/kotlin/Configurations.kt
@@ -17,6 +17,8 @@ fun Project.setupShadowJar() {
                 exclude(dependency("org.checkerframework:"))
             }
 
+            exclude("**/Utils21.class")
+
             relocate(
                     rootProject.group,
                     "com.github.benmanes.caffeine",
diff --git a/buildSrc/src/main/kotlin/DependencyInspection.kt b/buildSrc/src/main/kotlin/DependencyInspection.kt
new file mode 100644
index 0000000..5f7b001
--- /dev/null
+++ b/buildSrc/src/main/kotlin/DependencyInspection.kt
@@ -0,0 +1,61 @@
+import org.gradle.api.Project
+import org.gradle.api.artifacts.Configuration
+import java.io.File
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+
+
+fun inspectDependenciesForProject(project: Project) {
+    val inspectConfig = createInspectionConfiguration(project)
+    val files = resolveDependencies(inspectConfig, project) ?: return
+
+    if (files.isEmpty()) {
+        println("No dependencies found for project ${project.name}.")
+        return
+    }
+
+    files.forEach { file ->
+        inspectClassFilesInJar(file, project)
+    }
+}
+
+fun createInspectionConfiguration(project: Project): Configuration {
+    return project.configurations.create("inspectConfig").apply {
+        extendsFrom(project.configurations.findByName("implementation"))
+        isCanBeResolved = true
+    }
+}
+
+fun resolveDependencies(configuration: Configuration, project: Project): Set<File>? {
+    return try {
+        configuration.resolve()
+    } catch (e: Exception) {
+        println("Could not resolve dependencies for project ${project.name}.")
+        null
+    }
+}
+
+fun inspectClassFilesInJar(file: File, project: Project) {
+    project.zipTree(file).visit {
+        if (name.endsWith(".class")) {
+            val majorVersion = extractMajorVersionFromClassFile(this.file)
+
+            if (majorVersion == 65) {
+                println("""
+                    Warning: Class file in ${file.name} ${this.path}
+                    uses Java class version $majorVersion (file version 65)
+                """.trimIndent())
+            }
+        }
+    }
+}
+
+fun extractMajorVersionFromClassFile(classFile: File): Int {
+    val classFileBytes = classFile.readBytes()
+    val byteBuffer = ByteBuffer.wrap(classFileBytes).order(ByteOrder.BIG_ENDIAN)
+
+    // Skip the first 4 bytes for the magic number, then read the next two for minor and another two for major
+    byteBuffer.position(4)
+    val minorVersion = byteBuffer.short.toInt()
+    return byteBuffer.short.toInt()
+}