diff --git a/pom.xml b/pom.xml
index 0cc1513..8cc045d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -206,12 +206,13 @@
 			annotation <dependency> <groupId>KorapAnnotationProcessor</groupId> <artifactId>KorapAnnotationProcessor</artifactId> 
 			<version>0.0.1-SNAPSHOT</version> <scope>compile</scope> </dependency> -->
 
-		<!-- Some language extensions like StringUtil, IOUtils ... -->
-		<dependency>
-			<groupId>commons-lang</groupId>
-			<artifactId>commons-lang</artifactId>
-			<version>2.6</version>
-		</dependency>
+                <!-- Some language extensions like StringUtil, IOUtils ... -->
+                <dependency>
+                  <groupId>org.apache.commons</groupId>
+                  <artifactId>commons-lang3</artifactId>
+                  <version>3.12.0</version>
+                </dependency>
+                
 		<dependency>
 			<groupId>commons-cli</groupId>
 			<artifactId>commons-cli</artifactId>
diff --git a/src/main/java/de/ids_mannheim/korap/index/Indexer.java b/src/main/java/de/ids_mannheim/korap/index/Indexer.java
index d685b63..ed2f6b9 100644
--- a/src/main/java/de/ids_mannheim/korap/index/Indexer.java
+++ b/src/main/java/de/ids_mannheim/korap/index/Indexer.java
@@ -17,7 +17,7 @@
 import org.apache.commons.cli.Option;
 import org.apache.commons.cli.Options;
 import org.apache.commons.cli.ParseException;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.lucene.store.MMapDirectory;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
diff --git a/src/test/java/de/ids_mannheim/korap/search/TestMetaFields.java b/src/test/java/de/ids_mannheim/korap/search/TestMetaFields.java
index d91e4f1..5e6bce8 100644
--- a/src/test/java/de/ids_mannheim/korap/search/TestMetaFields.java
+++ b/src/test/java/de/ids_mannheim/korap/search/TestMetaFields.java
@@ -17,7 +17,7 @@
 import java.nio.charset.StandardCharsets;
 import java.nio.ByteBuffer;
 
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.lucene.analysis.Analyzer;
 import org.apache.lucene.analysis.TokenStream;
 import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;