diff --git a/mobsfscan/formatters/sarif.py b/mobsfscan/formatters/sarif.py
index 3328e2f..7ea534b 100644
--- a/mobsfscan/formatters/sarif.py
+++ b/mobsfscan/formatters/sarif.py
@@ -132,7 +132,7 @@ def sarif_output(outfile, scan_results, mobsfscan_version, path):
                 version=mobsfscan_version,
             )),
             invocations=[om.Invocation(
-                end_time_utc=datetime.now(datetime.timezone.utc).strftime(TS_FORMAT),
+                end_time_utc=datetime.utcnow().strftime(TS_FORMAT),
                 execution_successful=True,
             )])])
     run = log.runs[0]