diff --git a/heroku.Dockerfile b/heroku.Dockerfile
index 2c71639..34c28ec 100644
--- a/heroku.Dockerfile
+++ b/heroku.Dockerfile
@@ -2,7 +2,7 @@ FROM python:3.9
 
 # Install dependencies
 RUN apt-get update
-RUN apt-get install curl libpq-dev postgresql-client nodejs python3-poetry yarnpkg -y
+RUN apt-get install curl libpq-dev postgresql-client nodejs yarnpkg -y
 
 # Set working directory
 WORKDIR /home/indexer
@@ -11,6 +11,7 @@ WORKDIR /home/indexer
 COPY . .
 
 # Install indexer
+RUN pip3 install poetry==1.6.1
 RUN poetry install
 RUN poetry export --without-hashes --format=requirements.txt > requirements.txt
 RUN pip3 install -r requirements.txt