diff --git a/Makefile b/Makefile
index c3ea0bb..da57ccd 100644
--- a/Makefile
+++ b/Makefile
@@ -6,8 +6,8 @@ SHELL         = /bin/bash
 # Containers run as the current user rather than root (so that created files are not root-owned)
 DC_OPTS?=--rm -u $(shell id -u):$(shell id -g)
 
-DC_USER?="openmaptiles"
-DC_PASSWORD?="openmaptiles"
+DC_USER?=openmaptiles
+DC_PASSWORD?=openmaptiles
 
 # If set to a non-empty value, will use postgis-preloaded instead of postgis docker image
 USE_PRELOADED_IMAGE?=