diff --git a/tools/docker/Makefile b/tools/docker/Makefile
index a8d5eb62c5..72e7b98b0d 100644
--- a/tools/docker/Makefile
+++ b/tools/docker/Makefile
@@ -307,7 +307,7 @@ distclean_python: clean_python
 ##########################
 ##  MINIZINC CHALLENGE  ##
 ##########################
-MZN_TAG=or-tools-minizinc-challenge:2019v2
+MZN_TAG=or-tools-minizinc-challenge:2019v3
 
 minizinc-challenge-image:
 	docker build -f minizinc-challenge.Dockerfile -t $(MZN_TAG) .