diff --git a/Dockerfile b/Dockerfile
index bd495f07277626c24c0675d39c045601999a6fa2..ff2e01f3b57cdc20490dc41f0af10fa40dced26b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ RUN apt-get update -y
 RUN apt-get install -y git libpq-dev gcc
 
 # Environment variables
-ARG DB_HOST=$DB_HOST
+ENV DB_HOST=$DB_HOST
 
 # Set working directory
 WORKDIR /usr/src/app