diff --git a/Dockerfile-alpine b/Dockerfile-alpine
index d83e87b..1e53407 100644
--- a/Dockerfile-alpine
+++ b/Dockerfile-alpine
@@ -7,9 +7,11 @@ RUN set -x \
 	&& apk del ca-certificates
 
 ENV POSTGRES_DB **None**
+ENV POSTGRES_DB_FILE **None**
 ENV POSTGRES_HOST **None**
 ENV POSTGRES_PORT 5432
 ENV POSTGRES_USER **None**
+ENV POSTGRES_USER_FILE **None**
 ENV POSTGRES_PASSWORD **None**
 ENV POSTGRES_PASSWORD_FILE **None**
 ENV POSTGRES_EXTRA_OPTS '-Z9'
diff --git a/Dockerfile-debian b/Dockerfile-debian
index f65f1db..994d88e 100644
--- a/Dockerfile-debian
+++ b/Dockerfile-debian
@@ -7,9 +7,11 @@ RUN set -x \
 	&& apt-get purge -y --auto-remove ca-certificates && apt-get clean
 
 ENV POSTGRES_DB **None**
+ENV POSTGRES_DB_FILE **None**
 ENV POSTGRES_HOST **None**
 ENV POSTGRES_PORT 5432
 ENV POSTGRES_USER **None**
+ENV POSTGRES_USER_FILE **None**
 ENV POSTGRES_PASSWORD **None**
 ENV POSTGRES_PASSWORD_FILE **None**
 ENV POSTGRES_EXTRA_OPTS '-Z9'