diff --git a/16.0.Dockerfile b/16.0.Dockerfile
index e2308ffc8517c3c08cee9e4872930e7258461945..d6a46f5931c487ac78f3e3b1fc1472182c96fd13 100644
--- a/16.0.Dockerfile
+++ b/16.0.Dockerfile
@@ -40,7 +40,7 @@ RUN set -x; \
 
 COPY --from=builder /svc /svc
 RUN pip3 install --no-index --find-links=/svc/wheels -r https://raw.githubusercontent.com/oca/OCB/16.0/requirements.txt &&\
-        pip3 install -U --no-index --find-links=/svc/wheels astor openupgradelib phonenumbers python-stdnum>=1.18 PyYAML zxcvbn
+        pip3 install -U --no-index --find-links=/svc/wheels 'astor' 'openupgradelib' 'phonenumbers' 'python-stdnum>=1.18' 'PyYAML' 'zxcvbn'
 
 # Add Git Known Hosts
 COPY ./ssh_known_git_hosts /root/.ssh/known_hosts