diff --git a/libs/community/langchain_community/utilities/apify.py b/libs/community/langchain_community/utilities/apify.py
index efcae49e2d1..f80deb496d4 100644
--- a/libs/community/langchain_community/utilities/apify.py
+++ b/libs/community/langchain_community/utilities/apify.py
@@ -19,7 +19,7 @@ class ApifyWrapper(BaseModel):
     apify_client_async: Any
     apify_api_token: Optional[str] = None
 
-    @root_validator()
+    @root_validator(pre=True)
     def validate_environment(cls, values: Dict) -> Dict:
         """Validate environment.
         Validate that an Apify API token is set and the apify-client
diff --git a/libs/community/langchain_community/utilities/arcee.py b/libs/community/langchain_community/utilities/arcee.py
index 72170348583..3064fd16b4d 100644
--- a/libs/community/langchain_community/utilities/arcee.py
+++ b/libs/community/langchain_community/utilities/arcee.py
@@ -51,7 +51,7 @@ class DALMFilter(BaseModel):
     value: str
     _is_metadata: bool = False
 
-    @root_validator()
+    @root_validator(pre=True)
     def set_meta(cls, values: Dict) -> Dict:
         """document and name are reserved arcee keys. Anything else is metadata"""
         values["_is_meta"] = values.get("field_name") not in ["document", "name"]
diff --git a/libs/community/langchain_community/utilities/arxiv.py b/libs/community/langchain_community/utilities/arxiv.py
index bab2df8061b..394a97c0fdd 100644
--- a/libs/community/langchain_community/utilities/arxiv.py
+++ b/libs/community/langchain_community/utilities/arxiv.py
@@ -72,7 +72,7 @@ class ArxivAPIWrapper(BaseModel):
                 return False
         return True
 
-    @root_validator()
+    @root_validator(pre=True)
     def validate_environment(cls, values: Dict) -> Dict:
         """Validate that the python package exists in environment."""
         try:
diff --git a/libs/community/langchain_community/utilities/asknews.py b/libs/community/langchain_community/utilities/asknews.py
index 4ac5445568c..5e5fb246fc1 100644
--- a/libs/community/langchain_community/utilities/asknews.py
+++ b/libs/community/langchain_community/utilities/asknews.py
@@ -24,7 +24,7 @@ class AskNewsAPIWrapper(BaseModel):
 
         extra = Extra.forbid
 
-    @root_validator()
+    @root_validator(pre=True)
     def validate_environment(cls, values: Dict) -> Dict:
         """Validate that api credentials and python package exists in environment."""
 
diff --git a/libs/community/langchain_community/utilities/awslambda.py b/libs/community/langchain_community/utilities/awslambda.py
index 8dbaca563ae..916c7627f3c 100644
--- a/libs/community/langchain_community/utilities/awslambda.py
+++ b/libs/community/langchain_community/utilities/awslambda.py
@@ -34,7 +34,7 @@ class LambdaWrapper(BaseModel):
 
         extra = Extra.forbid
 
-    @root_validator()
+    @root_validator(pre=True)
     def validate_environment(cls, values: Dict) -> Dict:
         """Validate that python package exists in environment."""
 
@@ -47,8 +47,6 @@ class LambdaWrapper(BaseModel):
             )
 
         values["lambda_client"] = boto3.client("lambda")
-        values["function_name"] = values["function_name"]
-
         return values
 
     def run(self, query: str) -> str: