diff --git a/images/pegleg/Dockerfile.ubuntu_xenial b/images/pegleg/Dockerfile.ubuntu_xenial
index 8d4b2584..78b4714e 100644
--- a/images/pegleg/Dockerfile.ubuntu_xenial
+++ b/images/pegleg/Dockerfile.ubuntu_xenial
@@ -31,7 +31,7 @@ RUN set -ex \
          python3-dev \
          python3-pip \
          python3-setuptools \
-    && python3 -m pip install -U pip \
+    && python3 -m pip install -U 'pip<21.0' \
     && apt-get autoremove -yqq --purge \
     && apt-get clean \
     && rm -rf \