diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/launch/DefaultLauncher.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/launch/DefaultLauncher.java
index 52858c239..42a1fd25d 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/launch/DefaultLauncher.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/launch/DefaultLauncher.java
@@ -130,6 +130,9 @@ public class DefaultLauncher extends Launcher {
             if (options.getMinMemory() != null && options.getMinMemory() > 0)
                 res.add("-Xms" + options.getMinMemory() + "m");
 
+            if (options.getJava().getParsedVersion() >= JavaVersion.JAVA_16)
+                res.add("--illegal-access=permit");
+
             res.add("-Dfml.ignoreInvalidMinecraftCertificates=true");
             res.add("-Dfml.ignorePatchDiscrepancies=true");
         }
diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/util/platform/JavaVersion.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/util/platform/JavaVersion.java
index 180bfdf7c..6b3f44d18 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/util/platform/JavaVersion.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/util/platform/JavaVersion.java
@@ -96,6 +96,7 @@ public final class JavaVersion {
     public static final int JAVA_7 = 7;
     public static final int JAVA_8 = 8;
     public static final int JAVA_9 = 9;
+    public static final int JAVA_16 = 16;
 
     private static int parseVersion(String version) {
         Matcher matcher = VERSION.matcher(version);