diff --git a/Makefile b/Makefile
index 4a2ba0a..90d95c9 100644
--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,7 @@ init:
 plan: init
 	@mkdir -p $(PLAN_DIR)
 	$(call vault_env) && \
-	terragrunt --terragrunt-working-dir $(ENV_DIR) plan -out=$(PLAN_FILE)
+	terragrunt --terragrunt-working-dir $(ENV_DIR) plan -lock=false -out=$(PLAN_FILE)
 
 apply:
 	$(call vault_env) && \