diff --git a/stix_shifter/requirements.txt b/stix_shifter/requirements.txt
index e7586bbce..e485f0dd6 100644
--- a/stix_shifter/requirements.txt
+++ b/stix_shifter/requirements.txt
@@ -7,7 +7,7 @@ asynctest==0.13.0
 attrs==23.1.0
 azure-identity==1.12.0
 colorlog==6.7.0
-flask==2.3.3
+flask==3.0.0
 flatten_json==0.1.13
 json-fix==0.5.2
 jsonmerge==1.9.2