diff --git a/src/main/java/org/codelibs/fess/crawler/transformer/AbstractFessFileTransformer.java b/src/main/java/org/codelibs/fess/crawler/transformer/AbstractFessFileTransformer.java
index 879bcdcc1..93c02a732 100644
--- a/src/main/java/org/codelibs/fess/crawler/transformer/AbstractFessFileTransformer.java
+++ b/src/main/java/org/codelibs/fess/crawler/transformer/AbstractFessFileTransformer.java
@@ -81,7 +81,8 @@ public ResultData transform(final ResponseData responseData) {
         final ResultData resultData = new ResultData();
         resultData.setTransformerName(getName());
         try {
-            resultData.setData(dataSerializer.fromObjectToBinary(generateData(responseData)));
+            resultData.setRawData(generateData(responseData));
+            resultData.setSerializer(dataSerializer::fromObjectToBinary);
         } catch (final Exception e) {
             throw new CrawlingAccessException("Could not serialize object", e);
         }
diff --git a/src/main/java/org/codelibs/fess/crawler/transformer/FessXpathTransformer.java b/src/main/java/org/codelibs/fess/crawler/transformer/FessXpathTransformer.java
index 426804ed0..6165e0751 100644
--- a/src/main/java/org/codelibs/fess/crawler/transformer/FessXpathTransformer.java
+++ b/src/main/java/org/codelibs/fess/crawler/transformer/FessXpathTransformer.java
@@ -196,7 +196,8 @@ protected void storeData(final ResponseData responseData, final ResultData resul
         normalizeData(responseData, dataMap);
 
         try {
-            resultData.setData(dataSerializer.fromObjectToBinary(dataMap));
+            resultData.setRawData(dataMap);
+            resultData.setSerializer(dataSerializer::fromObjectToBinary);
         } catch (final Exception e) {
             throw new CrawlingAccessException("Could not serialize object: " + responseData.getUrl(), e);
         }