diff --git a/core/Dockerfile b/core/Dockerfile
index f143cf1..b3408cc 100644
--- a/core/Dockerfile
+++ b/core/Dockerfile
@@ -10,9 +10,10 @@ RUN apk update \
     && apk add --virtual build-deps gcc python3-dev musl-dev postgresql-dev \
     && apk add bash su-exec postgresql-client mysql-client \
     && pip install psycopg2 \
-	   	   		   mailman==3.1.0 \
-				   mailman-hyperkitty==1.1.0 \
-				   pymysql \
+                   mailman==3.1.0 \
+                   mailman-hyperkitty==1.1.0 \
+                   pymysql \
+                   alembic==0.9.5 \
     && apk del build-deps \
     && adduser -S mailman