diff --git a/CHANGES.md b/CHANGES.md
index 3a3a60388..b8c8d86bd 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -15,6 +15,7 @@ Release Notes.
 * Upgrade gson to 2.8.9.
 * Upgrade netty-codec-http2 to 4.1.79.Final.
 * Fix race condition causing agent to not reconnect after network error
+* Force the injected high-priority classes in order to avoid NoClassDefFoundError.
 
 #### Documentation
 
diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/plugin/bootstrap/BootstrapInstrumentBoost.java b/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/plugin/bootstrap/BootstrapInstrumentBoost.java
index caf5a10b2..523340a40 100644
--- a/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/plugin/bootstrap/BootstrapInstrumentBoost.java
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/plugin/bootstrap/BootstrapInstrumentBoost.java
@@ -22,7 +22,7 @@ import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.lang.instrument.Instrumentation;
-import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
@@ -86,7 +86,7 @@ public class BootstrapInstrumentBoost {
 
     public static AgentBuilder inject(PluginFinder pluginFinder, Instrumentation instrumentation,
         AgentBuilder agentBuilder, JDK9ModuleExporter.EdgeClasses edgeClasses) throws PluginException {
-        Map<String, byte[]> classesTypeMap = new HashMap<>();
+        Map<String, byte[]> classesTypeMap = new LinkedHashMap<>();
 
         if (!prepareJREInstrumentation(pluginFinder, classesTypeMap)) {
             return agentBuilder;