diff --git a/bar-charts-bokeh-bottle-python-3/requirements.txt b/bar-charts-bokeh-bottle-python-3/requirements.txt
index c7fe865..5c97619 100644
--- a/bar-charts-bokeh-bottle-python-3/requirements.txt
+++ b/bar-charts-bokeh-bottle-python-3/requirements.txt
@@ -1,3 +1,3 @@
-flask==0.12.2
+flask==1.0
 bokeh==0.12.5
 pandas==0.20.1