diff --git a/Makefile b/Makefile
index 9e5e7e6..aa8a068 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ pybinding:
 venv:
 ifeq ($(NO_VENV),0)
 	@virtualenv --python=$(PYTHON_EXE) --prompt="(msspec-$(VERSION)) " $(VENV_PATH)
-	@$(INSIDE_VENV) python -m ensurepip --upgrade --default-pip && pip install -r src/pip.freeze
+	$(INSIDE_VENV) wget https://bootstrap.pypa.io/get-pip.py && python get-pip.py && pip install -r src/pip.freeze && rm -f get-pip.py
 endif
 
 
diff --git a/utils/dockerized/linux/msspec b/utils/dockerized/linux/msspec
index bada033..5f5aa69 100644
--- a/utils/dockerized/linux/msspec
+++ b/utils/dockerized/linux/msspec
@@ -16,7 +16,7 @@
 # along with this msspec.  If not, see <http://www.gnu.org/licenses/>.
 #
 # Source file  : utils/dockerized/linux/msspec
-# Last modified: Wed, 22 Sep 2021 14:29:59 +0200
+# Last modified: Thu, 23 Sep 2021 16:53:02 +0200
 # Committed by : sylvain tricot <sylvain.tricot@univ-rennes1.fr>
 
 THIS_SCRIPT="$0"