diff --git a/src/main/java/com/github/sett4/dataformat/xlsx/XlsxMapper.java b/src/main/java/com/github/sett4/dataformat/xlsx/XlsxMapper.java
index c23ad85..c64212e 100644
--- a/src/main/java/com/github/sett4/dataformat/xlsx/XlsxMapper.java
+++ b/src/main/java/com/github/sett4/dataformat/xlsx/XlsxMapper.java
@@ -6,8 +6,6 @@
 import com.fasterxml.jackson.databind.introspect.BeanPropertyDefinition;
 import com.fasterxml.jackson.databind.util.LRUMap;
 import com.fasterxml.jackson.databind.util.NameTransformer;
-import com.fasterxml.jackson.dataformat.csv.CsvFactory;
-import com.fasterxml.jackson.dataformat.csv.CsvParser;
 import com.fasterxml.jackson.dataformat.csv.CsvSchema;
 
 import java.util.Collection;
@@ -81,27 +79,13 @@ public XlsxMapper configure(XlsxGenerator.Feature f, boolean state) {
         return state ? enable(f) : disable(f);
     }
 
-    public XlsxMapper configure(CsvParser.Feature f, boolean state) {
-        return state ? enable(f) : disable(f);
-    }
-
     public XlsxMapper enable(XlsxGenerator.Feature f) {
-        ((CsvFactory) _jsonFactory).enable(f);
-        return this;
-    }
-
-    public XlsxMapper enable(CsvParser.Feature f) {
-        ((CsvFactory) _jsonFactory).enable(f);
+        _jsonFactory.enable(f);
         return this;
     }
 
     public XlsxMapper disable(XlsxGenerator.Feature f) {
-        ((CsvFactory) _jsonFactory).disable(f);
-        return this;
-    }
-
-    public XlsxMapper disable(CsvParser.Feature f) {
-        ((CsvFactory) _jsonFactory).disable(f);
+        _jsonFactory.disable(f);
         return this;
     }
 
@@ -113,11 +97,11 @@ public XlsxMapper disable(CsvParser.Feature f) {
 
     /**
      * Overridden with more specific type, since factory we have
-     * is always of type {@link CsvFactory}
+     * is always of type {@link XlsxFactory}
      */
     @Override
-    public CsvFactory getFactory() {
-        return (CsvFactory) _jsonFactory;
+    public XlsxFactory getFactory() {
+        return (XlsxFactory) _jsonFactory;
     }
 
     /*
diff --git a/src/test/java/com/github/sett4/dataformat/xlsx/serialize/WriteSimpleTest.java b/src/test/java/com/github/sett4/dataformat/xlsx/serialize/WriteSimpleTest.java
index ffb3c69..31f19c1 100644
--- a/src/test/java/com/github/sett4/dataformat/xlsx/serialize/WriteSimpleTest.java
+++ b/src/test/java/com/github/sett4/dataformat/xlsx/serialize/WriteSimpleTest.java
@@ -1,10 +1,13 @@
 package com.github.sett4.dataformat.xlsx.serialize;
 
 import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+import com.fasterxml.jackson.core.JsonGenerator;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SequenceWriter;
+import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.dataformat.csv.CsvSchema;
 import com.github.sett4.dataformat.xlsx.ModuleTestBase;
+import com.github.sett4.dataformat.xlsx.XlsxGenerator;
 import com.github.sett4.dataformat.xlsx.XlsxMapper;
 import org.apache.poi.ss.usermodel.Sheet;
 import org.apache.poi.ss.usermodel.Workbook;
@@ -31,6 +34,7 @@ public void testSchema() throws Exception {
         System.out.println(file);
 
         XlsxMapper mapper = new XlsxMapper();
+        mapper.enable(XlsxGenerator.Feature.WRITE_NUMBERS_AS_STRINGS);
         CsvSchema schema = mapper.schemaFor(FiveMinuteUser.class).withHeader();
         SequenceWriter sequenceWriter = mapper.writer(schema).writeValues(file);
         sequenceWriter.write(user);