diff --git a/blockdiag/requirements.txt b/blockdiag/requirements.txt
index 3bc67f8da..f782a5ec0 100644
--- a/blockdiag/requirements.txt
+++ b/blockdiag/requirements.txt
@@ -1,7 +1,7 @@
 actdiag==3.0.0
 blockdiag==3.0.0
 Click==8.1.3
-Flask==2.2.2
+Flask==2.2.3
 funcparserlib==1.0.1
 gunicorn==20.1.0
 itsdangerous==2.1.2
@@ -11,5 +11,5 @@ nwdiag==3.0.0
 Pillow==9.4.0
 reportlab==3.6.12
 seqdiag==3.0.0
-webcolors==1.12
-Werkzeug==2.2.2
+webcolors==1.13
+Werkzeug==2.2.3