diff --git a/requirements.txt b/requirements.txt
index 0382aa2..16a954c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
-Flask==0.9
-Jinja2==2.6
-Werkzeug==0.8.3
-wsgiref==0.1.2
+Flask==1.1.1
+Jinja2==2.10.3
+Werkzeug==0.16.0
+ItsDangerous==1.1.0
+MarkupSafe==1.1.1