diff --git a/pyperformance/data-files/benchmarks/bm_fastapi/run_benchmark.py b/pyperformance/data-files/benchmarks/bm_fastapi/run_benchmark.py
index 3e440325..5857c07b 100644
--- a/pyperformance/data-files/benchmarks/bm_fastapi/run_benchmark.py
+++ b/pyperformance/data-files/benchmarks/bm_fastapi/run_benchmark.py
@@ -63,7 +63,7 @@ def setup_server():
 
 def bench_fastapi(loops, url):
     async def run_benchmark():
-        async with httpx.AsyncClient() as client:
+        async with httpx.AsyncClient(limits=httpx.Limits(max_connections=CONCURRENCY)) as client:
             t0 = pyperf.perf_counter()
 
             for i in range(loops):