diff --git a/src/main/scala/dev/mauch/spark/excel/DefaultSource.scala b/src/main/scala/dev/mauch/spark/excel/DefaultSource.scala
index facbb542..da073623 100644
--- a/src/main/scala/dev/mauch/spark/excel/DefaultSource.scala
+++ b/src/main/scala/dev/mauch/spark/excel/DefaultSource.scala
@@ -35,7 +35,7 @@ class DefaultSource extends RelationProvider with SchemaRelationProvider with Cr
     parameters: Map[String, String],
     schema: StructType
   ): ExcelRelation = {
-    val conf = sqlContext.sparkSession.sessionState.newHadoopConf()
+    val conf = sqlContext.sparkSession.sessionState.newHadoopConfWithOptions(parameters)
     val wbReader = WorkbookReader(parameters, conf)
     val dataLocator = DataLocator(parameters)
     ExcelRelation(
@@ -63,7 +63,7 @@ class DefaultSource extends RelationProvider with SchemaRelationProvider with Cr
     val path = checkParameter(parameters, "path")
     val header = checkParameter(parameters, "header").toBoolean
     val filesystemPath = new Path(path)
-    val conf = sqlContext.sparkSession.sessionState.newHadoopConf()
+    val conf = sqlContext.sparkSession.sessionState.newHadoopConfWithOptions(parameters)
     val fs = filesystemPath.getFileSystem(conf)
     new ExcelFileSaver(
       fs,
diff --git a/src/main/scala/dev/mauch/spark/excel/v2/ExcelTable.scala b/src/main/scala/dev/mauch/spark/excel/v2/ExcelTable.scala
index 9e50f0c1..6d1c8aa4 100644
--- a/src/main/scala/dev/mauch/spark/excel/v2/ExcelTable.scala
+++ b/src/main/scala/dev/mauch/spark/excel/v2/ExcelTable.scala
@@ -72,7 +72,9 @@ case class ExcelTable(
   /* Actual doing schema inferring */
   private def infer(sparkSession: SparkSession, inputPaths: Seq[FileStatus], options: ExcelOptions): StructType = {
     val excelHelper = ExcelHelper(options)
-    val conf = sparkSession.sessionState.newHadoopConf()
+    /* Hadoop Configurations are case sensitive. */
+    val caseSensitiveMap = map.asCaseSensitiveMap.asScala.toMap
+    val conf = sparkSession.sessionState.newHadoopConfWithOptions(caseSensitiveMap)
 
     /** Sampling ratio on file level (not row level as in CSV) */
     val paths = {