diff --git a/de.tudarmstadt.ukp.dkpro.keyphrases.wrappers-gpl/src/main/java/de/tudarmstadt/ukp/dkpro/keyphrases/bookindexing/wrapper/TfidfExtractor.java b/de.tudarmstadt.ukp.dkpro.keyphrases.wrappers-gpl/src/main/java/de/tudarmstadt/ukp/dkpro/keyphrases/bookindexing/wrapper/TfidfExtractor.java
index 53989fb..2b811af 100644
--- a/de.tudarmstadt.ukp.dkpro.keyphrases.wrappers-gpl/src/main/java/de/tudarmstadt/ukp/dkpro/keyphrases/bookindexing/wrapper/TfidfExtractor.java
+++ b/de.tudarmstadt.ukp.dkpro.keyphrases.wrappers-gpl/src/main/java/de/tudarmstadt/ukp/dkpro/keyphrases/bookindexing/wrapper/TfidfExtractor.java
@@ -14,6 +14,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Files;
 
 import org.apache.uima.analysis_engine.AnalysisEngineDescription;
 import org.apache.uima.resource.ResourceInitializationException;
@@ -78,7 +79,7 @@ public void buildTfidfModel(File inputDir, String suffix)
 		try {
 			final DfModelBuilder dfModelBuilder = new DfModelBuilder(getLanguage(),
 					inputDir, suffix);
-			File tmpFile = File.createTempFile("tfidf_model_ukp", "tmp");
+			File tmpFile = Files.createTempFile("tfidf_model_ukp", "tmp").toFile();
 			dfModelBuilder.buildKeyphraseCandidateModel(getCandidateSet(), tmpFile);
 			tfidfModelFile = tmpFile;
 		}
@@ -144,4 +145,4 @@ TfidfAnnotator.PARAM_IDF_MODE, getIdfWeightingMode().name()),
         		    TfidfRanking.PARAM_AGGREGATE,TfidfRanking.TfidfAggregate.max.name()));
 	}
 
-}
\ No newline at end of file
+}
diff --git a/de.tudarmstadt.ukp.dkpro.keyphrases.wrappers-gpl/src/main/java/de/tudarmstadt/ukp/dkpro/keyphrases/core/wrapper/TfidfExtractor.java b/de.tudarmstadt.ukp.dkpro.keyphrases.wrappers-gpl/src/main/java/de/tudarmstadt/ukp/dkpro/keyphrases/core/wrapper/TfidfExtractor.java
index 884031a..acc97f3 100644
--- a/de.tudarmstadt.ukp.dkpro.keyphrases.wrappers-gpl/src/main/java/de/tudarmstadt/ukp/dkpro/keyphrases/core/wrapper/TfidfExtractor.java
+++ b/de.tudarmstadt.ukp.dkpro.keyphrases.wrappers-gpl/src/main/java/de/tudarmstadt/ukp/dkpro/keyphrases/core/wrapper/TfidfExtractor.java
@@ -14,6 +14,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Files;
 
 import org.apache.uima.analysis_engine.AnalysisEngineDescription;
 import org.apache.uima.collection.CollectionReaderDescription;
@@ -97,7 +98,7 @@ TfidfAnnotator.PARAM_IDF_MODE, getIdfWeightingMode().name()),
      */
     public void buildTfidfModel(File inputDir, String suffix) throws ResourceInitializationException {
         try {
-            File tmpFile = File.createTempFile("tfidf_model_ukp", "tmp");
+            File tmpFile = Files.createTempFile("tfidf_model_ukp", "tmp").toFile();
             buildTfidfModel(inputDir, suffix, tmpFile);
         }
         catch (Exception e) {
@@ -203,4 +204,4 @@ public File getTfidfModelFile()
     {
         return tfidfModelFile;
     }
-}
\ No newline at end of file
+}