diff --git a/src/gabriel/utils/openai_utils.py b/src/gabriel/utils/openai_utils.py
index e36bddd..5340732 100644
--- a/src/gabriel/utils/openai_utils.py
+++ b/src/gabriel/utils/openai_utils.py
@@ -4994,7 +4994,7 @@ def maybe_adjust_concurrency() -> None:
                 concurrency_cap < growth_headroom_limit
                 and successes_since_adjust >= success_threshold
             ):
-                increment = max(1, int(math.ceil(max(concurrency_cap * 0.15, 2))))
+                increment = max(1, int(math.ceil(max(concurrency_cap * 0.1, 2))))
                 new_cap = min(ceiling_cap, concurrency_cap + increment)
                 if new_cap != concurrency_cap:
                     old_cap = concurrency_cap