diff --git a/core/Dockerfile b/core/Dockerfile
index 93d3bcc..291bedc 100644
--- a/core/Dockerfile
+++ b/core/Dockerfile
@@ -15,7 +15,7 @@ RUN --mount=type=cache,target=/root/.cache \
     && python3 -m pip install -U pip setuptools wheel \
         && python3 -m pip install psycopg2 \
                    gunicorn==19.9.0 \
-                   mailman==3.3.5 \
+                   mailman==3.3.6 \
                    mailman-hyperkitty==1.2.0 \
                    pymysql \
                    'sqlalchemy<1.4.0' \
diff --git a/postorius/Dockerfile b/postorius/Dockerfile
index fbf2d81..c678763 100644
--- a/postorius/Dockerfile
+++ b/postorius/Dockerfile
@@ -16,8 +16,8 @@ RUN --mount=type=cache,target=/root/.cache \
 	&& apk add --no-cache --virtual .mailman-rundeps bash sassc \
 		postgresql-client mysql-client py3-mysqlclient curl mailcap gettext \
 		python3 py3-pip libffi libuuid pcre-dev py-cryptography \
-	&& python3 -m pip install -U 'Django<3.2' pip setuptools wheel \
-	&& python3 -m pip install postorius==1.3.6 \
+	&& python3 -m pip install -U 'Django<4.2' pip setuptools wheel \
+	&& python3 -m pip install postorius==1.3.7 \
         uwsgi \
 		'psycopg2<2.9' \
 		dj-database-url \
diff --git a/web/Dockerfile b/web/Dockerfile
index cd0c94e..49d6acb 100644
--- a/web/Dockerfile
+++ b/web/Dockerfile
@@ -16,12 +16,11 @@ RUN --mount=type=cache,target=/root/.cache \
 	&& apk add --no-cache --virtual .mailman-rundeps bash sassc \
 	   postgresql-client mysql-client py3-mysqlclient curl mailcap gettext \
 	   python3 py3-pip xapian-core xapian-bindings-python3 libffi pcre-dev py-cryptography \
-	&& python3 -m pip install -U 'Django<3.2' pip setuptools wheel \
-	&& pip install mailmanclient==3.3.3 \
-		postorius==1.3.6 \
-		hyperkitty==1.3.5 \
-		django-mailman3==1.3.7 \
-		mistune==2.0.0rc1 \
+	&& python3 -m pip install -U 'Django<4.2' pip setuptools wheel \
+	&& pip install mailmanclient==3.3.4 \
+		postorius==1.3.7 \
+		hyperkitty==1.3.6 \
+		django-mailman3==1.3.8 \
 		whoosh \
 		uwsgi \
 		'psycopg2<2.9' \
@@ -33,6 +32,7 @@ RUN --mount=type=cache,target=/root/.cache \
 		python-memcached \
 		diskcache \
 		django-utils-six \
+		tzdata \
 	&& apk del .build-deps \
 	&& addgroup -S mailman \
 	&& adduser -S -G mailman mailman \
diff --git a/web/Dockerfile.dev b/web/Dockerfile.dev
index 9049528..8a1f466 100644
--- a/web/Dockerfile.dev
+++ b/web/Dockerfile.dev
@@ -37,7 +37,7 @@ RUN --mount=type=cache,target=/root/.cache \
 	tzdata \
         diskcache \
         django-utils-six \
-    && python3 -m pip install -U 'Django<4.3' \
+    && python3 -m pip install -U 'Django<4.2' \
     && python3 -m pip install -U \
        git+https://gitlab.com/mailman/django-mailman3 \
     && apk del .build-deps \