diff --git a/requirements.txt b/requirements.txt
index 3f6f6f0775..bc837bc7fb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,6 @@
+matplotlib==2.2.3; python_version < '3.0'
+matplotlib==3.0.2; python_version >= '3.0'
+PySide==1.2.4
+# PySide2==5.12.0
+Shiboken==1.2.2
 six==1.12.0