diff --git a/basics/20181219/requirements.txt b/basics/20181219/requirements.txt
old mode 100755
new mode 100644
index 304f78c..9690703
--- a/basics/20181219/requirements.txt
+++ b/basics/20181219/requirements.txt
@@ -1,2 +1,2 @@
-Flask==0.12
+Flask==2.3.2
 gensim==1.0.1
\ No newline at end of file