diff --git a/Dockerfile_lambda b/Dockerfile_lambda
index cf18dd9..4e711f3 100644
--- a/Dockerfile_lambda
+++ b/Dockerfile_lambda
@@ -7,18 +7,18 @@ RUN pip cache purge
 COPY ./src ${LAMBDA_TASK_ROOT}
 
 # Set up environment variables
-ARG EDS_API_URL=""
-ENV EDS_API_URL=$EDS_API_URL
-ARG EDS_AUTH_URL=""
-ENV EDS_AUTH_URL=$EDS_AUTH_URL
-ARG AWS_ACCESS_KEY_ID=""
-ENV AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID
-ARG AWS_SECRET_ACCESS_KEY=""
-ENV AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY
-ARG INPUT_JSON_PATH=""
-ENV INPUT_JSON_PATH=$INPUT_JSON_PATH
-ARG GATEWAY_STAGE=""
-ENV GATEWAY_STAGE=$GATEWAY_STAGE
+ARG EDS_API_URL
+ENV EDS_API_URL=${EDS_API_URL}
+ARG EDS_AUTH_URL
+ENV EDS_AUTH_URL=${EDS_AUTH_URL}
+ARG AWS_ACCESS_KEY_ID
+ENV AWS_ACCESS_KEY_ID=${AWS_ACCESS_KEY_ID}
+ARG AWS_SECRET_ACCESS_KEY
+ENV AWS_SECRET_ACCESS_KEY=${AWS_SECRET_ACCESS_KEY}
+ARG INPUT_JSON_PATH
+ENV INPUT_JSON_PATH=${INPUT_JSON_PATH}
+ARG GATEWAY_STAGE
+ENV GATEWAY_STAGE=${GATEWAY_STAGE}
 
 # Install the function's dependencies using file requirements.txt
 # from your project folder.