diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 0041ee3..19ac2fd 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -32,7 +32,7 @@ jobs:
         pyv: ["3.12"]
         vllm_version:
           # - "" # skip the pypi version as it will not work on CPU
-          - "git+https://github.com/vllm-project/vllm@v0.6.4"
+          - "git+https://github.com/vllm-project/vllm@v0.6.6.post1"
           - "git+https://github.com/vllm-project/vllm@main"
           - "git+https://github.com/opendatahub-io/vllm@main"
 
diff --git a/pyproject.toml b/pyproject.toml
index bb8e41f..f970b9a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ classifiers = [
 requires-python = ">=3.9"
 dynamic = ["version"]
 dependencies = [
-  "vllm>=0.6.4",
+  "vllm>=0.6.6.post1",
   "prometheus_client==0.21.0",
   "grpcio==1.67.0",
   "grpcio-health-checking==1.62.2",
diff --git a/src/vllm_tgis_adapter/grpc/grpc_server.py b/src/vllm_tgis_adapter/grpc/grpc_server.py
index 4ee4b1c..4479486 100644
--- a/src/vllm_tgis_adapter/grpc/grpc_server.py
+++ b/src/vllm_tgis_adapter/grpc/grpc_server.py
@@ -62,12 +62,7 @@
     from grpc.aio import ServicerContext
     from vllm import CompletionOutput, RequestOutput
     from vllm.config import ModelConfig
-
-    try:
-        from vllm.engine.protocol import EngineClient
-    except ImportError:
-        # fallback for versions <=v0.6.1.post2
-        from vllm.engine.protocol import AsyncEngineClient as EngineClient
+    from vllm.engine.protocol import EngineClient
     from vllm.lora.request import LoRARequest
     from vllm.sequence import Logprob
     from vllm.transformers_utils.tokenizer import AnyTokenizer