diff --git a/package/prepare_linux.sh b/package/prepare_linux.sh
index 61dc07e..458d926 100755
--- a/package/prepare_linux.sh
+++ b/package/prepare_linux.sh
@@ -5,7 +5,7 @@ sudo apt-get -qq install python3-pip python3-dev \
      build-essential qt5-default libxml2-dev libxslt1-dev \
      mesa-utils libgl1-mesa-glx libgl1-mesa-dev
 
-#pyenv local 3.6.7
-python3 --version
-#easy_install pip
-pip install pyqt5 lxml pytest pytest-faulthandler
+pyenv local 3.6.7
+python --version
+easy_install pip
+pip install pyqt5==5.9 lxml pytest pytest-faulthandler