diff --git a/agents/core-logic/requirements.txt b/agents/core-logic/requirements.txt
index 3f44ad1..92106db 100644
--- a/agents/core-logic/requirements.txt
+++ b/agents/core-logic/requirements.txt
@@ -1,10 +1,8 @@
-# OSVauco agent dependencies — pin versions to prevent surprise upgrades
+# OSVauco agent dependencies
 
-# ADK + Vertex AI SDK (must match)
-google-adk>=2.0.0
-google-cloud-aiplatform[adk,agent_engines]>=1.112.0
-
-# vertexai is bundled inside google-cloud-aiplatform >= 1.71 — no separate pin needed
+# ADK — must stay <2.0.0 while google-cloud-aiplatform[adk,agent_engines] requires google-adk<2.0.0
+google-adk>=1.0.0,<2.0.0
+google-cloud-aiplatform[adk,agent_engines,evaluation]>=1.112.0
 
 # Secret Manager integration
 google-cloud-secret-manager>=2.20.0
@@ -20,9 +18,6 @@ opentelemetry-exporter-gcp-trace>=1.8.0
 google-cloud-logging>=3.10.0
 google-cloud-monitoring>=2.22.0
 
-# Evaluation
-google-cloud-aiplatform[evaluation]>=1.112.0
-
 # HTTP server for Cloud Run
 uvicorn[standard]>=0.29.0
 fastapi>=0.111.0