diff --git a/requirements/common.txt b/requirements/common.txt
index 0a4b27c03447d..5405df359a336 100644
--- a/requirements/common.txt
+++ b/requirements/common.txt
@@ -49,3 +49,4 @@ ninja # Required for xgrammar, rocm, tpu, xpu
 pybase64 # fast base64 implementation
 cbor2 # Required for cross-language serialization of hashable objects
 setproctitle # Used to set process names for better debugging and monitoring
+openai-harmony >= 0.0.3  # Required for gpt-oss