diff --git a/d2j-base-cmd/src/main/java/com/googlecode/dex2jar/tools/Constants.java b/d2j-base-cmd/src/main/java/com/googlecode/dex2jar/tools/Constants.java
index 207d5851..d0322adb 100644
--- a/d2j-base-cmd/src/main/java/com/googlecode/dex2jar/tools/Constants.java
+++ b/d2j-base-cmd/src/main/java/com/googlecode/dex2jar/tools/Constants.java
@@ -8,6 +8,8 @@ private Constants() {
         throw new UnsupportedOperationException();
     }
 
+    public static final int MAX_JAVA_VERSION = 23;
+
     public static final int[] JAVA_VERSIONS = new int[]{
             0,
             Opcodes.V1_1,
@@ -31,6 +33,8 @@ private Constants() {
             Opcodes.V19,
             Opcodes.V20,
             Opcodes.V21,
+            Opcodes.V22,
+            Opcodes.V23,
     };
 
     public static final int ASM_VERSION = Opcodes.ASM9;
diff --git a/d2j-jasmin/src/main/java/com/googlecode/d2j/jasmin/Jasmin2JarCmd.java b/d2j-jasmin/src/main/java/com/googlecode/d2j/jasmin/Jasmin2JarCmd.java
index ed26c968..13694f9d 100644
--- a/d2j-jasmin/src/main/java/com/googlecode/d2j/jasmin/Jasmin2JarCmd.java
+++ b/d2j-jasmin/src/main/java/com/googlecode/d2j/jasmin/Jasmin2JarCmd.java
@@ -34,7 +34,8 @@ public class Jasmin2JarCmd extends BaseCmd implements Opcodes {
     private boolean forceOverwrite = false;
 
     @Opt(opt = "o", longOpt = "output", description = "output .jar file, default is "
-            + "$current_dir/[jar-name]-jasmin2jar.jar", argName = "out-jar-file")
+                                                      + "$current_dir/[jar-name]-jasmin2jar.jar",
+            argName = "out-jar-file")
     private Path output;
 
     @Opt(opt = "e", longOpt = "encoding", description = "encoding for .j files, default is UTF-8", argName = "enc")
@@ -46,7 +47,8 @@ public class Jasmin2JarCmd extends BaseCmd implements Opcodes {
     @Opt(longOpt = "no-compute-max", description = "", hasArg = false)
     private boolean noComputeMax;
 
-    @Opt(opt = "cv", longOpt = "class-version", description = "default .class version, [1~21], default 8 for JAVA8")
+    @Opt(opt = "cv", longOpt = "class-version", description = "default .class version, [1~" +
+                                                              Constants.MAX_JAVA_VERSION + "], default 8 for JAVA8")
     private int classVersion = 8;
 
     public Jasmin2JarCmd() {
@@ -62,9 +64,9 @@ protected void doCommandLine() throws Exception {
             usage();
             return;
         }
-        int maxClassVersion = Constants.JAVA_VERSIONS.length - 1;
-        if (classVersion < 1 || classVersion > maxClassVersion) {
-            throw new HelpException("-cv,--class-version out of range, 1-" + maxClassVersion + " is supported.");
+        if (classVersion < 1 || classVersion > Constants.MAX_JAVA_VERSION) {
+            throw new HelpException("-cv,--class-version out of range, 1-" + Constants.MAX_JAVA_VERSION +
+                                    " is supported.");
         }
 
         Path jar = new File(remainingArgs[0]).toPath().toAbsolutePath();