diff --git a/cbporganizer-backend/src/main/java/cbporganizer/service/FilesStorageServiceImpl.java b/cbporganizer-backend/src/main/java/cbporganizer/service/FilesStorageServiceImpl.java
index 390f66e..965410b 100644
--- a/cbporganizer-backend/src/main/java/cbporganizer/service/FilesStorageServiceImpl.java
+++ b/cbporganizer-backend/src/main/java/cbporganizer/service/FilesStorageServiceImpl.java
@@ -41,7 +41,7 @@ public void save(MultipartFile file) {
         }
     }
 
-    public void extractGZip(File inputFile) {
+    private void extractGZip(File inputFile) {
         try {
             TarArchiveInputStream tarInput = new TarArchiveInputStream(new GZIPInputStream(new FileInputStream(inputFile)));