diff --git a/blockdiag/requirements.txt b/blockdiag/requirements.txt
index e85f21158..5ce8884e5 100644
--- a/blockdiag/requirements.txt
+++ b/blockdiag/requirements.txt
@@ -1,15 +1,15 @@
 actdiag==3.0.0
 blockdiag==3.0.0
-Click==8.0.4
-Flask==2.0.3
-funcparserlib==1.0.0a0
+Click==8.1.3
+Flask==2.1.2
+funcparserlib==1.0.0
 gunicorn==20.1.0
-itsdangerous==2.1.1
-Jinja2==3.0.3
+itsdangerous==2.1.2
+Jinja2==3.1.2
 MarkupSafe==2.1.1
 nwdiag==3.0.0
-Pillow==9.0.1
-reportlab==3.6.8
+Pillow==9.1.1
+reportlab==3.6.9
 seqdiag==3.0.0
-webcolors==1.11.1
-Werkzeug==2.0.3
+webcolors==1.12
+Werkzeug==2.1.2