diff --git a/Dockerfile b/Dockerfile
index bf14c398..0e7aa7c2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,6 +29,8 @@ COPY Pipfile* /tmp/
 # hadolint ignore=DL3013
 RUN pip install --no-cache-dir -U pip pipenv==2020.11.15 \
  && pipenv lock -r > /requirements.txt \
+ && echo "psycopg2-binary==2.8.6" >> /requirements.txt \
+ && echo "django-heroku==0.3.1" >> /requirements.txt \
  && pip install --no-cache-dir -r /requirements.txt \
  && pip wheel --no-cache-dir -r /requirements.txt -w /deps
 
diff --git a/app.json b/app.json
index a5bddf0b..71a7e76f 100644
--- a/app.json
+++ b/app.json
@@ -38,7 +38,7 @@
     },
     "stack": "container",
     "scripts": {
-        "postdeploy": "sh tools/heroku.sh"
+        "postdeploy": "sh /doccano/tools/heroku.sh"
     },
     "addons": [
         {
diff --git a/tools/heroku.sh b/tools/heroku.sh
index 5d335f86..14b011cc 100644
--- a/tools/heroku.sh
+++ b/tools/heroku.sh
@@ -3,5 +3,5 @@
 set -o errexit
 
 if [ -n "$ADMIN_USER_NAME" ]; then
-    python app/manage.py create_admin --noinput --username="$ADMIN_USER_NAME" --email="$ADMIN_CONTACT_EMAIL" --password="$ADMIN_PASSWORD"
+    python /doccano/app/manage.py create_admin --noinput --username="$ADMIN_USER_NAME" --email="$ADMIN_CONTACT_EMAIL" --password="$ADMIN_PASSWORD"
 fi