diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index cb29c690..54ba79ca 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -29,7 +29,6 @@ jobs:
             pip install -r requirements.txt
             python3 -m pip install PyQt5==5.14
             python3 -c "from PyQt5.QtCore import QSettings; print('done')"
-            pip3 install --upgrade zope.interface
             make install
     - name: Test
       run: make test
diff --git a/requirements.txt b/requirements.txt
index af575b2d..896f50fa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,5 +18,5 @@ beautifulsoup4>=4.9.1
 PyJWT==2.1.0
 Flask-RESTful>=0.3.9
 aiofiles
-zope.interface==6.0
+zope.interface==5.0.0
 ping3
\ No newline at end of file