diff -Nur a/morfologik-tools/src/main/java/morfologik/tools/CliTool.java b/morfologik-tools/src/main/java/morfologik/tools/CliTool.java
--- a/morfologik-tools/src/main/java/morfologik/tools/CliTool.java	2023-08-23 14:39:58.823450555 +0800
+++ b/morfologik-tools/src/main/java/morfologik/tools/CliTool.java	2023-08-23 14:43:50.962815645 +0800
@@ -178,13 +178,13 @@
   private static void helpDisplayCommandOptions(PrintStream pw, String command, JCommander jc) {
     StringBuilder sb = new StringBuilder();
     jc = jc.getCommands().get(command);
-    jc.getUsageFormatter().usage(sb, "");
+    jc.usage(sb, "");
     pw.print(sb);
   }
 
   private static void helpDisplayCommandOptions(PrintStream pw, JCommander jc) {
     StringBuilder sb = new StringBuilder();
-    jc.getUsageFormatter().usage(sb, "");
+    jc.usage(sb, "");
     pw.print(sb);
   }  
 }
diff -Nur a/morfologik-tools/src/main/java/morfologik/tools/CustomParameterConverters.java b/morfologik-tools/src/main/java/morfologik/tools/CustomParameterConverters.java
--- a/morfologik-tools/src/main/java/morfologik/tools/CustomParameterConverters.java	2023-08-23 14:39:58.823450555 +0800
+++ b/morfologik-tools/src/main/java/morfologik/tools/CustomParameterConverters.java	2023-08-23 14:52:13.722103640 +0800
@@ -1,11 +1,11 @@
 package morfologik.tools;
 
-import com.beust.jcommander.IStringConverter;
-import com.beust.jcommander.IStringConverterFactory;
-
 import java.nio.file.Path;
 import java.nio.file.Paths;
 
+import com.beust.jcommander.IStringConverter;
+import com.beust.jcommander.IStringConverterFactory;
+
 class CustomParameterConverters implements IStringConverterFactory {
   public static class PathConverter implements IStringConverter<Path> {
     @Override
@@ -14,10 +14,11 @@
     }
   }
 
+  @SuppressWarnings({ "unchecked", "rawtypes" })
   @Override
-  public Class<? extends IStringConverter<?>> getConverter(Class<?> forType) {
+  public <T> Class<? extends IStringConverter<T>> getConverter(Class<T> forType) {
     if (forType.equals(Path.class)) {
-      return PathConverter.class;
+      return (Class) PathConverter.class;
     }
     return null;
   }