diff --git a/pyproject.toml b/pyproject.toml
index b83ea3fb..af38fe54 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ dependencies = [
     "pydantic-settings>=2.10.1", # Config management
     "a2a-sdk>=0.3.0", # For Google Agent2Agent protocol
     "deprecated>=1.2.18",
-    "google-adk>=1.10.0", # For basic agent architecture
+    "google-adk>=1.11.0", # For basic agent architecture
     "litellm>=1.74.3", # For model inference
     "loguru>=0.7.3", # For better logging
     "opentelemetry-exporter-otlp>=1.35.0",
diff --git a/veadk/configs/model_configs.py b/veadk/configs/model_configs.py
index e0efbdb6..d253e164 100644
--- a/veadk/configs/model_configs.py
+++ b/veadk/configs/model_configs.py
@@ -17,7 +17,6 @@
 
 from pydantic_settings import BaseSettings, SettingsConfigDict
 
-from veadk.auth.veauth.ark_veauth import ARKVeAuth
 from veadk.consts import (
     DEFAULT_MODEL_AGENT_API_BASE,
     DEFAULT_MODEL_AGENT_NAME,
@@ -39,4 +38,10 @@ class ModelConfig(BaseSettings):
 
     @cached_property
     def api_key(self) -> str:
-        return os.getenv("MODEL_AGENT_API_KEY") or ARKVeAuth().token
+        _api_key = os.getenv("MODEL_AGENT_API_KEY")
+        if not _api_key:
+            # Only import ARKVeAuth if api_key is not set
+            from veadk.auth.veauth.ark_veauth import ARKVeAuth
+
+            _api_key = ARKVeAuth().token
+        return _api_key