diff --git a/requirements-build.txt b/requirements-build.txt
index 2b71063cb..dc6d59ef0 100644
--- a/requirements-build.txt
+++ b/requirements-build.txt
@@ -1,3 +1,3 @@
 Babel==2.6
-PyInstaller==4.0
+PyInstaller==4.1
 setuptools<45.0.0