diff --git a/Alignment/MillePedeAlignmentAlgorithm/scripts/mps_prepare_input_db.py b/Alignment/MillePedeAlignmentAlgorithm/scripts/mps_prepare_input_db.py
index 6a257b14fbc1d..9783a23b11205 100755
--- a/Alignment/MillePedeAlignmentAlgorithm/scripts/mps_prepare_input_db.py
+++ b/Alignment/MillePedeAlignmentAlgorithm/scripts/mps_prepare_input_db.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import sys
 import argparse
diff --git a/Alignment/OfflineValidation/scripts/validateAlignments.py b/Alignment/OfflineValidation/scripts/validateAlignments.py
index e38967e67e388..d667fef3fb516 100755
--- a/Alignment/OfflineValidation/scripts/validateAlignments.py
+++ b/Alignment/OfflineValidation/scripts/validateAlignments.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #test execute: export CMSSW_BASE=/tmp/CMSSW && ./validateAlignments.py -c defaultCRAFTValidation.ini,test.ini -n -N test
 from __future__ import print_function
 from future.utils import lmap