diff --git a/find_duplicate_files/find_duplicate_files.py b/find_duplicate_files/find_duplicate_files.py
index f57b892..3020a12 100644
--- a/find_duplicate_files/find_duplicate_files.py
+++ b/find_duplicate_files/find_duplicate_files.py
@@ -47,9 +47,8 @@ class find_duplicate_files:
                     if file.is_file():
                         hash = hashlib.sha256()
                         with open(file.path, 'r') as file_pointer:
-                            file_content = file_pointer.read()
-                            hash.update(file_content.encode('utf-8'))
-                            files[hash.hexdigest()] = file.path
+                            digest = hashlib.file_digest(f, "sha256")
+                            files[digest.hexdigest()] = file.path
                     elif file.is_dir(follow_symlinks=False):
                         more_files = self.recursive_scandir(
                             file.path,