Update requirements.txt

requirements.txt

@@ -1,4 +1,5 @@
-fastapi>=0.111.0
-uvicorn[standard]>=0.29.0
-httpx>=0.27.0
-pydantic>=2.7.0
+fastapi==0.115.5
+uvicorn[standard]==0.32.1
+httpx==0.27.2
+pydantic==2.10.3
+python-multipart==0.0.12