diff --git a/examples/configs/grpo_math_8B_megatron.yaml b/examples/configs/grpo_math_8B_megatron.yaml
index fc839c8239..8273656ea7 100644
--- a/examples/configs/grpo_math_8B_megatron.yaml
+++ b/examples/configs/grpo_math_8B_megatron.yaml
@@ -54,7 +54,7 @@ policy:
       weight_decay_incr_style: "constant"
       lr_decay_style: "constant"
       lr_decay_iters: null
-      lr_warmup_iters: 50
+      lr_warmup_iters: 13
       lr_warmup_init: 3.0e-8
 
   generation: