diff --git a/.circleci/config.yml b/.circleci/config.yml
index db0c724e..96385020 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -21,8 +21,8 @@ jobs:
 
         - image: docker.elastic.co/elasticsearch/elasticsearch-oss:6.2.4
           environment:
-            - discovery.type=single-node
-            - "ES_JAVA_OPTS=-Xms64m -Xmx64m"
+            - discovery.type: single-node
+            - ES_JAVA_OPTS: "-Xms750m -Xmx750m"
           ports:
             - "127.0.0.1:9200:9200"