diff --git a/pom.xml b/pom.xml
index b2be2d2..104c1e7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -100,7 +100,7 @@
                         <path>
                             <groupId>info.picocli</groupId>
                             <artifactId>picocli-codegen</artifactId>
-                            <version>4.2.0</version>
+                            <version>4.5.0</version>
                         </path>
                     </annotationProcessorPaths>
                     <compilerArgs>
@@ -243,7 +243,7 @@
         <dependency>
             <groupId>info.picocli</groupId>
             <artifactId>picocli</artifactId>
-            <version>4.2.0</version>
+            <version>4.5.0</version>
         </dependency>
 
         <!-- https://mvnrepository.com/artifact/org.apache.opennlp/opennlp-tools -->
@@ -286,5 +286,10 @@
             <artifactId>jcp</artifactId>
             <version>7.0.4</version>
         </dependency>
+        <dependency>
+            <groupId>io.github.classgraph</groupId>
+            <artifactId>classgraph</artifactId>
+            <version>4.8.90</version>
+        </dependency>
     </dependencies>
 </project>
diff --git a/src/assembly/bin-distribution.xml b/src/assembly/bin-distribution.xml
index d213453..8e8ed99 100644
--- a/src/assembly/bin-distribution.xml
+++ b/src/assembly/bin-distribution.xml
@@ -18,6 +18,8 @@
                     <include>opennlp/tools/tokenize/Tokenizer.class</include>
                     <include>opennlp/tools/sentdetect/SentenceDetector.class</include>
                     <include>picocli/CommandLine*.class</include>
+                    <include>io/github/classgraph/*.class</include>
+                    <include>nonapi/io/github/classgraph/**/*.class</include>
                 </includes>
             </unpackOptions>
             <scope>runtime</scope>
diff --git a/src/main/java/de/ids_mannheim/korap/tokenizer/Main.java b/src/main/java/de/ids_mannheim/korap/tokenizer/Main.java
index 82c6884..26f48f7 100644
--- a/src/main/java/de/ids_mannheim/korap/tokenizer/Main.java
+++ b/src/main/java/de/ids_mannheim/korap/tokenizer/Main.java
@@ -1,5 +1,8 @@
 package de.ids_mannheim.korap.tokenizer;
 
+import io.github.classgraph.ClassGraph;
+import io.github.classgraph.ClassInfoList;
+import io.github.classgraph.ScanResult;
 import picocli.CommandLine;
 
 import java.io.*;
@@ -7,13 +10,33 @@
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.util.ArrayList;
+import java.util.List;
 import java.util.concurrent.Callable;
+import java.util.stream.Collectors;
 
 @CommandLine.Command(mixinStandardHelpOptions = true,
         name = "koraptokenizer", version = "{}", description = "Tokenizes (and sentence splits) text input.")
 public class Main implements Callable<Integer> {
 
-    @CommandLine.Option(names = {"-T",  "--tokenizer-class"}, description = "Class name of the actual tokenizer that will be used (default: ${DEFAULT-VALUE})")
+    static class AvailableKorapTokenizerList extends ArrayList<String> {
+        AvailableKorapTokenizerList() {
+            super(listKorAPTokenizerImplementations());
+        }
+
+        static List<String> listKorAPTokenizerImplementations() {
+            List<String> korapTokenizerClassNames;
+            try (ScanResult scanResult = new ClassGraph().enableAllInfo().acceptPackages("*")
+                    .scan()) {
+                ClassInfoList korapTokenizerClasses = scanResult.getClassesImplementing("de.ids_mannheim.korap.tokenizer.KorapTokenizer");
+                korapTokenizerClassNames = korapTokenizerClasses.getNames();
+            }
+            return korapTokenizerClassNames;
+        }
+    }
+
+    @CommandLine.Option(names = {"-T", "--tokenizer-class"},
+            completionCandidates= AvailableKorapTokenizerList.class,
+            description = "Class name of the actual tokenizer that will be used (candidates: ${COMPLETION-CANDIDATES} default: ${DEFAULT-VALUE})")
     String tokenizerClassName = DerekoDfaTokenizer_de.class.getName();
 
     @CommandLine.Option(names = {"--no-tokens"}, negatable = true, description = "Print tokens (default: ${DEFAULT-VALUE})")