diff --git a/google/genai/_replay_api_client.py b/google/genai/_replay_api_client.py
index 263cf2ac8..d36931307 100644
--- a/google/genai/_replay_api_client.py
+++ b/google/genai/_replay_api_client.py
@@ -109,11 +109,11 @@ def _redact_request_headers(headers: dict[str, str]) -> dict[str, str]:
     elif header_name.lower() == 'user-agent':
       redacted_headers[header_name] = _redact_language_label(
           _redact_version_numbers(header_value)
-      )
+      ).replace('agentplatform-genai-modules', 'vertex-genai-modules')
     elif header_name.lower() == 'x-goog-api-client':
       redacted_headers[header_name] = _redact_language_label(
           _redact_version_numbers(header_value)
-      )
+      ).replace('agentplatform-genai-modules', 'vertex-genai-modules')
     elif header_name.lower() == 'x-goog-user-project':
       continue
     elif header_name.lower() == 'authorization':