diff --git a/requirements.txt b/requirements.txt
index 4c51c9e..72e740b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,9 +14,7 @@ pyinstaller-hooks-contrib==2021.5
 PyOpenGL==3.1.5
 pyparsing==3.0.6
 pypiwin32==223
-PyQt5==5.15.6
-PyQt5-Qt5==5.15.2
-PyQt5-sip==12.9.0
+PyQt5==5.9.2
 pyqtgraph==0.11.1
 python-dateutil==2.8.2
 pywin32==304