diff --git a/.travis.yml b/.travis.yml
index 4443c8763..7933b8b2e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,7 +27,6 @@ before_install:
  - travis_retry python2 -m pip install --user unittest2
  - travis_retry python2 -m pip install --user pexpect # imported by tools/ci.py
  - travis_retry python2 -m pip install --user pygments
- - travis_retry python2 -m pip install --user semver
 # Python 3 modules
  - travis_retry python3 -m pip install --user setuptools --upgrade
  - travis_retry python3 -m pip install --user pytest
@@ -37,7 +36,7 @@ before_install:
  - travis_retry python3 -m pip install --user requests # imported by tools/pr.py
  - travis_retry python3 -m pip install --user pygments
  - travis_retry sudo python3 -m pip install demjson # installs jsonlint => sudo required
- - travis_retry python3 -m pip install --user semver
+ - travis_retry python3 -m pip install --user natsort
 
 matrix:
 # do notify immediately about it when a job of a build fails.
diff --git a/tools/daca2-download.py b/tools/daca2-download.py
old mode 100644
new mode 100755
index 336e1555e..8a05332ab
--- a/tools/daca2-download.py
+++ b/tools/daca2-download.py
@@ -1,9 +1,9 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Downloads all daca2 source code packages.
 #
 # Usage:
-# $ mkdir ~/daca2-packages && python daca2-download.py
+# $ ./daca2-download.py
 
 
 import subprocess
@@ -12,7 +12,7 @@ import shutil
 import glob
 import os
 import time
-import semver
+import natsort
 
 DEBIAN = ('ftp://ftp.se.debian.org/debian/',
           'ftp://ftp.debian.org/debian/')
@@ -33,11 +33,8 @@ def wget(filepath):
 
 
 def latestvername(names):
-    if len(names) == 1:
-        return names[0]
-    names.sort(cmp=semver.cmp, key=lambda x: x[x.index(
-        '_')+1:x.index('.orig.tar')-x.index('_')+1])
-    return names[-1]
+    s = natsort.natsorted(names, key=lambda x: x[x.index('_')+1:x.index('.orig.tar')])
+    return s[-1]
 
 
 def getpackages():
diff --git a/tools/daca2-getpackages.py b/tools/daca2-getpackages.py
old mode 100644
new mode 100755
index 9e0288ac1..6cfc5b197
--- a/tools/daca2-getpackages.py
+++ b/tools/daca2-getpackages.py
@@ -1,11 +1,11 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Get list of debian packages
 #
 # Usage:
 #
 # cd cppcheck/tools
-# python daca2-getpackages.py
+# ./daca2-getpackages.py
 #
 
 
@@ -19,7 +19,7 @@ import os
 import re
 import datetime
 import time
-import semver
+import natsort
 
 DEBIAN = ('ftp://ftp.de.debian.org/debian/',
           'ftp://ftp.debian.org/debian/')
@@ -39,15 +39,8 @@ def wget(filepath):
 
 
 def latestvername(names):
-    if len(names) == 1:
-        return names[0]
-    try:
-        names.sort(cmp=semver.compare, key=lambda x: x[x.index('_')+1:x.index('.orig.tar')])
-    except ValueError:
-        # semver.compare() throws an exception if the version is not formatted
-        # like it is required by semver. For example 0.8 is not valid.
-        pass
-    return names[-1]
+    s = natsort.natsorted(names, key=lambda x: x[x.index('_')+1:x.index('.orig.tar')])
+    return s[-1]
 
 
 def getpackages():
diff --git a/tools/test/start_donate_cpu_server_test_local.sh b/tools/test/start_donate_cpu_server_test_local.sh
index b53124707..4bd19555f 100644
--- a/tools/test/start_donate_cpu_server_test_local.sh
+++ b/tools/test/start_donate_cpu_server_test_local.sh
@@ -22,7 +22,7 @@ fi
 
 if [ ! -f "${dacaathome_path}/packages.txt" ]
 then
-    python "${cppcheck_tools_path}/daca2-getpackages.py" > "${dacaathome_path}/packages.txt"
+    "${cppcheck_tools_path}/daca2-getpackages.py" > "${dacaathome_path}/packages.txt"
 fi
 
 while :