diff --git a/service/heat-api.yaml b/service/heat-api.yaml
index 0aa1f97..702e217 100644
--- a/service/heat-api.yaml
+++ b/service/heat-api.yaml
@@ -1,3 +1,4 @@
+dsl_version: 0.1.0
 service:
   name: heat-api
   ports:
diff --git a/service/heat-engine.yaml b/service/heat-engine.yaml
index 6dbb3ed..81aaf26 100644
--- a/service/heat-engine.yaml
+++ b/service/heat-engine.yaml
@@ -1,3 +1,4 @@
+dsl_version: 0.1.0
 service:
   name: heat-engine
   containers: