diff --git a/core/Dockerfile b/core/Dockerfile
index fcae376d..da0d1e01 100644
--- a/core/Dockerfile
+++ b/core/Dockerfile
@@ -10,10 +10,9 @@ RUN apk update \
     && apk add --virtual build-deps gcc python3-dev musl-dev postgresql-dev \
     && apk add bash su-exec postgresql-client mysql-client curl \
     && pip install psycopg2 \
-                   mailman==3.1.0 \
+                   mailman==3.1.1 \
                    mailman-hyperkitty==1.1.0 \
                    pymysql \
-                   alembic==0.9.5 \
     && apk del build-deps \
     && adduser -S mailman
 
diff --git a/web/Dockerfile b/web/Dockerfile
index 2755e0f7..9bf442db 100644
--- a/web/Dockerfile
+++ b/web/Dockerfile
@@ -16,7 +16,7 @@ RUN set -ex \
 	&& apk add --no-cache --virtual .mailman-rundeps bash sassc \
 	   postgresql-client mysql-client py-mysqldb curl \
 	&& pip install -U mailmanclient==3.1.1 \
-		postorius==1.1.0 \
+		postorius==1.1.1 \
 		hyperkitty==1.1.4 \
 		django-mailman3==1.1.0 \
 		whoosh \