diff --git a/run_ci_tests.sh b/run_ci_tests.sh
index 1e59705..fb0134f 100755
--- a/run_ci_tests.sh
+++ b/run_ci_tests.sh
@@ -32,7 +32,7 @@ git log -2
 fi
 
 pip install --upgrade tox
-pip install --upgrade --force-reinstall pygments chardet
+pip install --upgrade --force-reinstall pygments chardet 'pyzmq<=17.0.0'
 pip3 install "pygit2 == `rpm -q libgit2 --queryformat='%{version}'`"
 parallel -v ::: \
 "tox --sitepackages -e 'py27-flask011-ci' -- -v --with-xcoverage --cover-erase --cover-package=pagure" \