diff --git a/fbpcs/CHANGELOG.md b/fbpcs/CHANGELOG.md
index c9776b728..ff037c45f 100644
--- a/fbpcs/CHANGELOG.md
+++ b/fbpcs/CHANGELOG.md
@@ -17,7 +17,7 @@ Types of changes
 ### Added
 
 ### Changed
-
+  - Mark validate_container_definition as deprecated in PCSContainerService since it is no longer a public method in ContainerService in fbpcp
 ### Removed
 
 ## [1.10.0] - 2022-08-12
diff --git a/fbpcs/common/service/pcs_container_service.py b/fbpcs/common/service/pcs_container_service.py
index 25b04274f..ce41bd4aa 100644
--- a/fbpcs/common/service/pcs_container_service.py
+++ b/fbpcs/common/service/pcs_container_service.py
@@ -15,6 +15,8 @@
 from fbpcs.common.entity.pcs_container_instance import PCSContainerInstance
 from fbpcs.experimental.cloud_logs.log_retriever import CloudProvider, LogRetriever
 
+from fbpcs.private_computation.service.utils import deprecated
+
 
 class PCSContainerService(ContainerService):
     def __init__(self, inner_container_service: ContainerService) -> None:
@@ -80,7 +82,8 @@ def cancel_instances(self, instance_ids: List[str]) -> List[Optional[PcpError]]:
     def get_current_instances_count(self) -> int:
         return self.inner_container_service.get_current_instances_count()
 
+    @deprecated(
+        "validate_container_definition is no longer a public method in container service"
+    )
     def validate_container_definition(self, container_definition: str) -> None:
-        return self.inner_container_service.validate_container_definition(
-            container_definition
-        )
+        pass