diff --git a/README.md b/README.md
index 88682a8..33f5a2d 100644
--- a/README.md
+++ b/README.md
@@ -203,6 +203,8 @@ We sincerely appreciate the efforts of these teams for their contributions to op
 - [Multimodal-Search-R1](https://github.com/EvolvingLMMs-Lab/multimodal-search-r1): Incentivizing LMMs to Search. [![[code]](https://img.shields.io/github/stars/EvolvingLMMs-Lab/multimodal-search-r1)](https://github.com/EvolvingLMMs-Lab/multimodal-search-r1)
 - [OTC](https://arxiv.org/pdf/2504.14870): Optimal Tool Calls via Reinforcement Learning.
 - [ZeroSearch](https://github.com/Alibaba-NLP/ZeroSearch): Incentivize the Search Capability of LLMs without Searching. [![[code]](https://img.shields.io/github/stars/Alibaba-NLP/ZeroSearch)](https://github.com/Alibaba-NLP/ZeroSearch)
+- [IKEA](https://github.com/hzy312/knowledge-r1): Reinforced Internal-External Knowledge Synergistic Reasoning for Efficient Adaptive Search Agent. [![[code]](https://img.shields.io/github/stars/hzy312/knowledge-r1)](https://github.com/hzy312/knowledge-r1)
+
 
 ## Citations