diff --git a/dev-tools/aggregate_coverage.py b/dev-tools/aggregate_coverage.py
index b15c531487e..9c8c5f2daed 100644
--- a/dev-tools/aggregate_coverage.py
+++ b/dev-tools/aggregate_coverage.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """Simple script to concatenate coverage reports.
 """
diff --git a/dev-tools/deploy b/dev-tools/deploy
index 2b0de52e4c0..1fce7b913a6 100755
--- a/dev-tools/deploy
+++ b/dev-tools/deploy
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import os
 import argparse
 from subprocess import check_call
diff --git a/dev-tools/get_version b/dev-tools/get_version
index 595e8a451ad..63163efd136 100755
--- a/dev-tools/get_version
+++ b/dev-tools/get_version
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import os
 import re
 import argparse
diff --git a/dev-tools/merge_pr b/dev-tools/merge_pr
index 2d6f119ccb2..9664a8cfc33 100755
--- a/dev-tools/merge_pr
+++ b/dev-tools/merge_pr
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import sys
 import argparse
 from subprocess import check_call, call, check_output
diff --git a/dev-tools/open_pr b/dev-tools/open_pr
index 4c72f88f845..c208a76f89c 100755
--- a/dev-tools/open_pr
+++ b/dev-tools/open_pr
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """Open a PR from the current branch"""
 
 import sys
diff --git a/dev-tools/promote_docs b/dev-tools/promote_docs
index ab3dbcbe9fb..846cae02700 100644
--- a/dev-tools/promote_docs
+++ b/dev-tools/promote_docs
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import argparse
 from subprocess import check_call
 
diff --git a/dev-tools/set_docs_version b/dev-tools/set_docs_version
index 86375bfefe4..d8510b0ef3e 100755
--- a/dev-tools/set_docs_version
+++ b/dev-tools/set_docs_version
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import argparse
 from subprocess import check_call
 
diff --git a/dev-tools/set_version b/dev-tools/set_version
index d6e2481d5be..64e258fed90 100755
--- a/dev-tools/set_version
+++ b/dev-tools/set_version
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import argparse
 import os
 import re
diff --git a/filebeat/tests/system/test_input.py b/filebeat/tests/system/test_input.py
index e1e51126ed3..0075329205b 100644
--- a/filebeat/tests/system/test_input.py
+++ b/filebeat/tests/system/test_input.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from filebeat import BaseTest
 import os
diff --git a/filebeat/tests/system/test_registrar.py b/filebeat/tests/system/test_registrar.py
index f2e299de8ef..15ab6f60484 100644
--- a/filebeat/tests/system/test_registrar.py
+++ b/filebeat/tests/system/test_registrar.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """Test the registrar"""
 import os
 import platform
diff --git a/filebeat/tests/system/test_registrar_upgrade.py b/filebeat/tests/system/test_registrar_upgrade.py
index 2f54435339c..84d5ac8b4ff 100644
--- a/filebeat/tests/system/test_registrar_upgrade.py
+++ b/filebeat/tests/system/test_registrar_upgrade.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """Test the registrar with old registry file formats"""
 
 import os
diff --git a/filebeat/tests/system/test_stdin.py b/filebeat/tests/system/test_stdin.py
index 7f8287aefed..6d701fdfbf5 100644
--- a/filebeat/tests/system/test_stdin.py
+++ b/filebeat/tests/system/test_stdin.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from filebeat import BaseTest
 import os
diff --git a/libbeat/scripts/generate_makefile_doc.py b/libbeat/scripts/generate_makefile_doc.py
index 2ad26bbbfe2..0bae7b2cab6 100644
--- a/libbeat/scripts/generate_makefile_doc.py
+++ b/libbeat/scripts/generate_makefile_doc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """
 This script generates and output a documentation from a list of Makefile files
diff --git a/packetbeat/tests/system/gen/memcache/tcp_counter_ops.py b/packetbeat/tests/system/gen/memcache/tcp_counter_ops.py
index 20ab1192ac4..b59635a95fc 100755
--- a/packetbeat/tests/system/gen/memcache/tcp_counter_ops.py
+++ b/packetbeat/tests/system/gen/memcache/tcp_counter_ops.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import mc
 
diff --git a/packetbeat/tests/system/gen/memcache/tcp_delete.py b/packetbeat/tests/system/gen/memcache/tcp_delete.py
index 1adb312796a..6bee71bcd57 100755
--- a/packetbeat/tests/system/gen/memcache/tcp_delete.py
+++ b/packetbeat/tests/system/gen/memcache/tcp_delete.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import mc
 
diff --git a/packetbeat/tests/system/gen/memcache/tcp_multi_store_load.py b/packetbeat/tests/system/gen/memcache/tcp_multi_store_load.py
index 1530ab6207d..1db021ef8ee 100755
--- a/packetbeat/tests/system/gen/memcache/tcp_multi_store_load.py
+++ b/packetbeat/tests/system/gen/memcache/tcp_multi_store_load.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import mc
 
diff --git a/packetbeat/tests/system/gen/memcache/tcp_single_load_store.py b/packetbeat/tests/system/gen/memcache/tcp_single_load_store.py
index b5e8f9c1966..c706be9daf2 100755
--- a/packetbeat/tests/system/gen/memcache/tcp_single_load_store.py
+++ b/packetbeat/tests/system/gen/memcache/tcp_single_load_store.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import mc
 
diff --git a/packetbeat/tests/system/gen/memcache/tcp_stats.py b/packetbeat/tests/system/gen/memcache/tcp_stats.py
index b3a8257ca25..ccab1d49728 100755
--- a/packetbeat/tests/system/gen/memcache/tcp_stats.py
+++ b/packetbeat/tests/system/gen/memcache/tcp_stats.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import mc
 
diff --git a/packetbeat/tests/system/gen/memcache/udp_counter_ops.py b/packetbeat/tests/system/gen/memcache/udp_counter_ops.py
index 9b4bfc30a6e..f7d326930f5 100755
--- a/packetbeat/tests/system/gen/memcache/udp_counter_ops.py
+++ b/packetbeat/tests/system/gen/memcache/udp_counter_ops.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import mc
 
diff --git a/packetbeat/tests/system/gen/memcache/udp_delete.py b/packetbeat/tests/system/gen/memcache/udp_delete.py
index e439d3be715..e112b67357b 100755
--- a/packetbeat/tests/system/gen/memcache/udp_delete.py
+++ b/packetbeat/tests/system/gen/memcache/udp_delete.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import mc
 
diff --git a/packetbeat/tests/system/gen/memcache/udp_multi_store.py b/packetbeat/tests/system/gen/memcache/udp_multi_store.py
index 92e252bf0d4..4a92738da77 100755
--- a/packetbeat/tests/system/gen/memcache/udp_multi_store.py
+++ b/packetbeat/tests/system/gen/memcache/udp_multi_store.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import mc
 
diff --git a/packetbeat/tests/system/gen/memcache/udp_single_store.py b/packetbeat/tests/system/gen/memcache/udp_single_store.py
index 1e98b245894..7f1303043c2 100755
--- a/packetbeat/tests/system/gen/memcache/udp_single_store.py
+++ b/packetbeat/tests/system/gen/memcache/udp_single_store.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import mc