diff --git a/examples/vllm/config-shared-prefix.yml b/examples/vllm/config-shared-prefix.yml
index 8aa9d353..75078ce7 100644
--- a/examples/vllm/config-shared-prefix.yml
+++ b/examples/vllm/config-shared-prefix.yml
@@ -6,7 +6,8 @@ load:
     duration: 30
   - rate: 2
     duration: 30
-api: completion
+api:
+  type: completion
 server:
   type: vllm
   model_name: HuggingFaceTB/SmolLM2-135M-Instruct
diff --git a/examples/vllm/config-synthetic.yml b/examples/vllm/config-synthetic.yml
index 05a6332d..61b39961 100644
--- a/examples/vllm/config-synthetic.yml
+++ b/examples/vllm/config-synthetic.yml
@@ -6,7 +6,8 @@ load:
     duration: 30
   - rate: 2
     duration: 30
-api: completion
+api:
+  type: completion
 server:
   type: vllm
   model_name: HuggingFaceTB/SmolLM2-135M-Instruct