diff --git a/Makefile b/Makefile
index 34b3c1af..ba20b4b9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 # This Makefile is only used by developers.
-PYVER=2.4
+PYVER=2.5
 PYTHON=python$(PYVER)
 VERSION=$(shell $(PYTHON) setup.py --version)
 HOST=www.debian.org
diff --git a/scripts/run.sh b/scripts/run.sh
index 580844ac..9c19f026 100755
--- a/scripts/run.sh
+++ b/scripts/run.sh
@@ -2,5 +2,5 @@
 # Run python interpreter with current dir as search path, and remove all
 # locale and proxy settings.
 # Set PYOPTS for options, for example PYOPTS=-O.
-PYVER=2.4
+PYVER=2.5
 env -u ftp_proxy -u http_proxy -u LANGUAGE -u LC_ALL -u LC_CTYPE LANG=C PYTHONPATH=`pwd` python${PYVER} ${PYOPTS:-} "$@"