diff --git a/async_processor/__init__.py b/async_processor/__init__.py
index feea5ad..80688a1 100644
--- a/async_processor/__init__.py
+++ b/async_processor/__init__.py
@@ -10,7 +10,6 @@
     InputConfig,
     InputMessage,
     InputMessageInterface,
-    InputMessageV2,
     KafkaInputConfig,
     KafkaOutputConfig,
     KafkaSASLAuth,
@@ -49,6 +48,5 @@
     "KafkaSASLAuth",
     "AsyncProcessor",
     "CoreNATSOutputConfig",
-    "InputMessageV2",
     "InputMessageInterface",
 ]
diff --git a/async_processor/processor.py b/async_processor/processor.py
index 7c71aa4..d0a1694 100644
--- a/async_processor/processor.py
+++ b/async_processor/processor.py
@@ -8,11 +8,9 @@
 
 from async_processor.app import ProcessorApp
 from async_processor.logger import logger
-from async_processor.pydantic_v1 import ValidationError
 from async_processor.types import (
     InputMessage,
     InputMessageInterface,
-    InputMessageV2,
     OutputMessage,
     WorkerConfig,
 )
@@ -39,10 +37,7 @@ def input_deserializer(
                 f"Expected dict, got {type(input_message)}"
             )
         logger.debug(f"Deserializing input message: {input_message!r}")
-        try:
-            return InputMessage(**input_message)
-        except ValidationError:
-            return InputMessageV2(**input_message)
+        return InputMessage(**input_message)
 
     def output_serializer(self, output_message: OutputMessage) -> bytes:
         logger.debug(f"Serializing output message: {output_message!r}")
diff --git a/async_processor/types.py b/async_processor/types.py
index 011ba67..72fbf7c 100644
--- a/async_processor/types.py
+++ b/async_processor/types.py
@@ -48,44 +48,6 @@ def get_request_method(self) -> Optional[str]:
 
 
 class InputMessage(InputMessageInterface):
-    request_id: constr(min_length=1)
-    body: Any
-    published_at_epoch_ns: Optional[int] = None
-    stream_response: bool = False
-    request_headers: Optional[Dict[str, Union[str, List[str]]]] = None
-    request_url_path: Optional[str] = None
-    request_method: Optional[str] = None
-
-    class Config:
-        extra = Extra.forbid
-
-    def get_request_id(self) -> Optional[str]:
-        return self.request_id
-
-    def get_published_at_epoch_ns(self) -> Optional[int]:
-        return self.published_at_epoch_ns
-
-    # TODO: this method is only here for sidecar
-    # move this logic to sidecar module
-    def get_body(self) -> Any:
-        return self.body
-
-    def should_stream_response(self) -> bool:
-        return self.stream_response
-
-    def get_request_headers(self) -> Optional[Dict[str, Union[str, List[str]]]]:
-        return self.request_headers
-
-    def get_request_url_path(self) -> Optional[str]:
-        return self.request_url_path
-
-    def get_request_method(self) -> Optional[str]:
-        return self.request_method
-
-
-# We cannot maintain two different types and should remove `InputMessage`
-# after sometime
-class InputMessageV2(InputMessageInterface):
     tfy_request_id: Optional[constr(regex=r"^[a-zA-Z0-9\-]{1,36}$")] = None
     tfy_published_at_epoch_ns: Optional[int] = None
     tfy_stream_response: bool = False
@@ -131,7 +93,7 @@ class OutputMessage(BaseModel):
     status: ProcessStatus
     body: Optional[Any] = None
     error: Optional[str] = None
-    input_message: Optional[Union[InputMessage, InputMessageV2]] = None
+    input_message: Optional[InputMessage] = None
 
     # these are experimental fields
     status_code: Optional[str] = None
diff --git a/tests/test_processor.py b/tests/test_processor.py
index f37bd07..e853d20 100644
--- a/tests/test_processor.py
+++ b/tests/test_processor.py
@@ -1,14 +1,10 @@
-from async_processor import InputMessage, InputMessageV2
+from async_processor import InputMessage
 from async_processor.processor import BaseProcessor
 
 
 def test_default_input_deserializer():
     p = BaseProcessor()
 
-    assert p.input_deserializer(
-        serialized_input_message='{"request_id": "a", "body": "a"}'
-    ) == InputMessage(request_id="a", body="a")
-
-    assert p.input_deserializer(
-        serialized_input_message='{"a": "b"}'
-    ) == InputMessageV2(a="b")
+    assert p.input_deserializer(serialized_input_message='{"a": "b"}') == InputMessage(
+        a="b"
+    )
diff --git a/tests/test_types.py b/tests/test_types.py
index 44f4bf5..0f2667c 100644
--- a/tests/test_types.py
+++ b/tests/test_types.py
@@ -1,10 +1,8 @@
-from async_processor import InputMessage, InputMessageV2
+from async_processor import InputMessage
 
 
 def test_input_message_get_body():
-    assert InputMessage(request_id="a", body="b").get_body() == "b"
-
-    assert InputMessageV2(tfy_request_id="a", foo="bar", baz=[1, 2]).get_body() == {
+    assert InputMessage(tfy_request_id="a", foo="bar", baz=[1, 2]).get_body() == {
         "foo": "bar",
         "baz": [1, 2],
     }