diff --git a/src/main/resources/fess_thumbnail.xml b/src/main/resources/fess_thumbnail.xml
index 201388540..87e889c06 100644
--- a/src/main/resources/fess_thumbnail.xml
+++ b/src/main/resources/fess_thumbnail.xml
@@ -73,28 +73,43 @@
 		</postConstruct>
 		<postConstruct name="addCondition">
 			<arg>"mimetype"</arg>
-			<arg>"application/vnd.openxmlformats-officedocument.wordprocessingml.document"
-			</arg>
+			<arg>"application/vnd.openxmlformats-officedocument.wordprocessingml.document"</arg>
 		</postConstruct>
 		<postConstruct name="addCondition">
 			<arg>"mimetype"</arg>
-			<arg>"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
-			</arg>
+			<arg>"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"</arg>
 		</postConstruct>
 		<postConstruct name="addCondition">
 			<arg>"mimetype"</arg>
-			<arg>"application/vnd.openxmlformats-officedocument.presentationml.presentation"
-			</arg>
+			<arg>"application/vnd.openxmlformats-officedocument.presentationml.presentation"</arg>
 		</postConstruct>
 		<postConstruct name="addCondition">
 			<arg>"mimetype"</arg>
-			<arg>"application/msword"
-			</arg>
+			<arg>"application/msword"</arg>
 		</postConstruct>
 		<postConstruct name="addCondition">
 			<arg>"mimetype"</arg>
-			<arg>"application/vnd.ms-excel"
-			</arg>
+			<arg>"application/vnd.ms-excel"</arg>
+		</postConstruct>
+		<postConstruct name="addCondition">
+			<arg>"mimetype"</arg>
+			<arg>"application/vnd.ms-excel.sheet.2"</arg>
+		</postConstruct>
+		<postConstruct name="addCondition">
+			<arg>"mimetype"</arg>
+			<arg>"application/vnd.ms-excel.sheet.3"</arg>
+		</postConstruct>
+		<postConstruct name="addCondition">
+			<arg>"mimetype"</arg>
+			<arg>"application/vnd.ms-excel.sheet.4"</arg>
+		</postConstruct>
+		<postConstruct name="addCondition">
+			<arg>"mimetype"</arg>
+			<arg>"application/vnd.ms-excel.workspace.3"</arg>
+		</postConstruct>
+		<postConstruct name="addCondition">
+			<arg>"mimetype"</arg>
+			<arg>"application/vnd.ms-excel.workspace.4"</arg>
 		</postConstruct>
 		<postConstruct name="addCondition">
 			<arg>"mimetype"</arg>
@@ -103,8 +118,7 @@
 		</postConstruct>
 		<postConstruct name="addCondition">
 			<arg>"mimetype"</arg>
-			<arg>"application/rtf"
-			</arg>
+			<arg>"application/rtf"</arg>
 		</postConstruct>
 	</component>
 	<component name="pdfThumbnailGenerator" class="org.codelibs.fess.thumbnail.impl.CommandGenerator">
diff --git a/src/main/webapp/WEB-INF/crawler/resources/app.xml b/src/main/webapp/WEB-INF/crawler/resources/app.xml
index cd0d1da11..304782037 100644
--- a/src/main/webapp/WEB-INF/crawler/resources/app.xml
+++ b/src/main/webapp/WEB-INF/crawler/resources/app.xml
@@ -60,6 +60,26 @@
 			<arg>"application/vnd.ms-excel"</arg>
 			<arg>"excel"</arg>
 		</postConstruct>
+		<postConstruct name="add">
+			<arg>"application/vnd.ms-excel.sheet.2"</arg>
+			<arg>"excel"</arg>
+		</postConstruct>
+		<postConstruct name="add">
+			<arg>"application/vnd.ms-excel.sheet.3"</arg>
+			<arg>"excel"</arg>
+		</postConstruct>
+		<postConstruct name="add">
+			<arg>"application/vnd.ms-excel.sheet.4"</arg>
+			<arg>"excel"</arg>
+		</postConstruct>
+		<postConstruct name="add">
+			<arg>"application/vnd.ms-excel.workspace.3"</arg>
+			<arg>"excel"</arg>
+		</postConstruct>
+		<postConstruct name="add">
+			<arg>"application/vnd.ms-excel.workspace.4"</arg>
+			<arg>"excel"</arg>
+		</postConstruct>
 		<postConstruct name="add">
 			<arg>"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"</arg>
 			<arg>"excel"</arg>