diff --git a/ZipFileManipulator.java b/ZipFileManipulator.java
index 3aae8b0..8c817b3 100644
--- a/ZipFileManipulator.java
+++ b/ZipFileManipulator.java
@@ -36,4 +36,18 @@ public class ZipFileManipulator {
         Files.copy(source, outputLocation.toPath());
     }
 
+    public void insertFile(String targetFile) throws Exception {
+      Path myFilePath = Paths.get(targetFile);
+  
+      Path zipFilePath = Paths.get(this.fileName);
+      try( FileSystem fs = FileSystems.newFileSystem(zipFilePath, null) ){
+          Path fileInsideZipPath = fs.getPath("/ppt/" + targetFile);
+          Files.delete(fileInsideZipPath);
+          Files.copy(myFilePath, fileInsideZipPath);
+          
+      } catch (IOException e) {
+          e.printStackTrace();
+      }
+    }
+
 }
\ No newline at end of file