diff --git a/aws-sam-cli-main/samcli/lib/utils/hash.py b/aws-sam-cli-main/samcli/lib/utils/hash.py
index a9cbae1..41dd8c9 100644
--- a/aws-sam-cli-main/samcli/lib/utils/hash.py
+++ b/aws-sam-cli-main/samcli/lib/utils/hash.py
@@ -21,8 +21,7 @@ def file_checksum(file_name: str) -> str:
 
     """
     with open(file_name, "rb") as file_handle:
-        md5 = hashlib.md5()
-
+        md5 = hashlib.sha256()
         # Save current cursor position and reset cursor to start of file
         curpos = file_handle.tell()
         file_handle.seek(0)