diff --git a/core/Dockerfile b/core/Dockerfile
index ff64bbf..6d0b4f9 100644
--- a/core/Dockerfile
+++ b/core/Dockerfile
@@ -13,7 +13,7 @@ RUN apk update \
 	&& python3 -m pip install -U pip \
         && python3 -m pip install psycopg2 \
                    gunicorn==19.9.0 \
-                   mailman==3.3.0 \
+                   mailman==3.3.1 \
                    mailman-hyperkitty==1.1.0 \
                    pymysql \
     && apk del build-deps \
diff --git a/web/Dockerfile b/web/Dockerfile
index 404843e..192e4d2 100644
--- a/web/Dockerfile
+++ b/web/Dockerfile
@@ -18,9 +18,9 @@ RUN set -ex \
 	   python3 py3-setuptools xapian-core xapian-bindings-python3 libffi \
 	&& python3 -m pip install -U 'Django<3.0' pip \
 	&& python3 -m pip install mailmanclient==3.3.0 \
-		postorius==1.3.2 \
-		hyperkitty==1.3.2 \
-		django-mailman3==1.3.2 \
+		postorius==1.3.3 \
+		hyperkitty==1.3.3 \
+		django-mailman3==1.3.4 \
 		whoosh \
 		uwsgi \
 		psycopg2 \