diff --git a/setup.py b/setup.py
index de824dc..ba9447d 100644
--- a/setup.py
+++ b/setup.py
@@ -38,7 +38,8 @@
     packages=find_packages(exclude=["ez_setup"]),
     install_requires=[
         "guillotina>=6.4.3",
-        "elasticsearch[async]>=7.8.0,<8.0.0"
+        "elasticsearch[async]>=7.8.0,<8.0.0",
+        "zope.interface==5.1.0"  # TODO: remove once guillotina has solved this
     ],
     tests_require=test_requires,
     extras_require={"test": test_requires},