diff --git a/.circleci/config.yml b/.circleci/config.yml
index 3594e9f8..23bf4806 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -18,6 +18,7 @@ jobs:
       - run:
           name: install dependencies
           command: |
+            sudo apt-get update && sudo apt-get install python3-pyqt5
             sudo pip3 install -r install/requirements.txt
             sudo pip3 install -r install/requirements-tests.txt
             sudo pip3 install pytest-cov flake8
diff --git a/install/requirements.txt b/install/requirements.txt
index f09d2e95..32ec6887 100644
--- a/install/requirements.txt
+++ b/install/requirements.txt
@@ -17,7 +17,7 @@ pycparser==2.18
 pycryptodome==3.6.6
 PyInstaller==3.4
 PyNaCl==1.2.1
-PyQt5==5.11.3
+PyQt5==5.11.2
 PyQt5-sip==4.19.12
 PySocks==1.6.8
 requests==2.19.1