diff --git a/examples_input/requirements-dev.txt b/examples_input/requirements-dev.txt
index 137cb8b..4824c90 100644
--- a/examples_input/requirements-dev.txt
+++ b/examples_input/requirements-dev.txt
@@ -1,3 +1,3 @@
 aiohttp==2.3.9
 terminaltables==3.1.0
-flask==0.1.2
\ No newline at end of file
+flask==1.0
\ No newline at end of file