diff --git a/main.go b/main.go
index 709a04a..f7f50b1 100644
--- a/main.go
+++ b/main.go
@@ -21,7 +21,7 @@
 	"github.com/sirupsen/logrus"
 )
 
-var queueForConcurrent = make(chan struct{}, 1111)
+var queueForConcurrent = make(chan struct{}, 1250)
 var wg sync.WaitGroup
 var numberFiles int = 0
 var corpusPath = flag.String("p", "", "Corpus path")
@@ -78,7 +78,7 @@
 					size:         file.Size(),
 				}
 				if *configurationFolder == "" {
-					if extension == ".pdf" {
+					if fileData.mimetype == "application/pdf" {
 						wg.Add(1)
 						go processPDF(&fileData)
 					} else if extension == ".xml" && strings.Contains(fileData.mimetype, "text") {