diff --git a/easyci2/flask/requirements.txt b/easyci2/flask/requirements.txt
index 342ef5a2..1acbaf4f 100644
--- a/easyci2/flask/requirements.txt
+++ b/easyci2/flask/requirements.txt
@@ -20,7 +20,7 @@ itsdangerous==1.1.0
 Jinja2==2.11.3
 lockfile==0.12.2
 MarkupSafe==1.1.1
-msgpack==0.6.2
+msgpack==1.2.1
 packaging==20.3
 pep517==0.8.2
 pluggy==0.13.1