diff --git a/poetry.lock b/poetry.lock
index b8b0cd9f..fae39ba5 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -3568,56 +3568,35 @@ files = [
 
 [[package]]
 name = "pydantic"
-version = "1.10.7"
-description = "Data validation and settings management using python type hints"
+version = "1.6.2"
+description = "Data validation and settings management using python 3.6 type hinting"
 category = "main"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.6"
 files = [
-    {file = "pydantic-1.10.7-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:e79e999e539872e903767c417c897e729e015872040e56b96e67968c3b918b2d"},
-    {file = "pydantic-1.10.7-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:01aea3a42c13f2602b7ecbbea484a98169fb568ebd9e247593ea05f01b884b2e"},
-    {file = "pydantic-1.10.7-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:516f1ed9bc2406a0467dd777afc636c7091d71f214d5e413d64fef45174cfc7a"},
-    {file = "pydantic-1.10.7-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:ae150a63564929c675d7f2303008d88426a0add46efd76c3fc797cd71cb1b46f"},
-    {file = "pydantic-1.10.7-cp310-cp310-musllinux_1_1_i686.whl", hash = "sha256:ecbbc51391248116c0a055899e6c3e7ffbb11fb5e2a4cd6f2d0b93272118a209"},
-    {file = "pydantic-1.10.7-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:f4a2b50e2b03d5776e7f21af73e2070e1b5c0d0df255a827e7c632962f8315af"},
-    {file = "pydantic-1.10.7-cp310-cp310-win_amd64.whl", hash = "sha256:a7cd2251439988b413cb0a985c4ed82b6c6aac382dbaff53ae03c4b23a70e80a"},
-    {file = "pydantic-1.10.7-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:68792151e174a4aa9e9fc1b4e653e65a354a2fa0fed169f7b3d09902ad2cb6f1"},
-    {file = "pydantic-1.10.7-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:dfe2507b8ef209da71b6fb5f4e597b50c5a34b78d7e857c4f8f3115effaef5fe"},
-    {file = "pydantic-1.10.7-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:10a86d8c8db68086f1e30a530f7d5f83eb0685e632e411dbbcf2d5c0150e8dcd"},
-    {file = "pydantic-1.10.7-cp311-cp311-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:d75ae19d2a3dbb146b6f324031c24f8a3f52ff5d6a9f22f0683694b3afcb16fb"},
-    {file = "pydantic-1.10.7-cp311-cp311-musllinux_1_1_i686.whl", hash = "sha256:464855a7ff7f2cc2cf537ecc421291b9132aa9c79aef44e917ad711b4a93163b"},
-    {file = "pydantic-1.10.7-cp311-cp311-musllinux_1_1_x86_64.whl", hash = "sha256:193924c563fae6ddcb71d3f06fa153866423ac1b793a47936656e806b64e24ca"},
-    {file = "pydantic-1.10.7-cp311-cp311-win_amd64.whl", hash = "sha256:b4a849d10f211389502059c33332e91327bc154acc1845f375a99eca3afa802d"},
-    {file = "pydantic-1.10.7-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:cc1dde4e50a5fc1336ee0581c1612215bc64ed6d28d2c7c6f25d2fe3e7c3e918"},
-    {file = "pydantic-1.10.7-cp37-cp37m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:e0cfe895a504c060e5d36b287ee696e2fdad02d89e0d895f83037245218a87fe"},
-    {file = "pydantic-1.10.7-cp37-cp37m-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:670bb4683ad1e48b0ecb06f0cfe2178dcf74ff27921cdf1606e527d2617a81ee"},
-    {file = "pydantic-1.10.7-cp37-cp37m-musllinux_1_1_i686.whl", hash = "sha256:950ce33857841f9a337ce07ddf46bc84e1c4946d2a3bba18f8280297157a3fd1"},
-    {file = "pydantic-1.10.7-cp37-cp37m-musllinux_1_1_x86_64.whl", hash = "sha256:c15582f9055fbc1bfe50266a19771bbbef33dd28c45e78afbe1996fd70966c2a"},
-    {file = "pydantic-1.10.7-cp37-cp37m-win_amd64.whl", hash = "sha256:82dffb306dd20bd5268fd6379bc4bfe75242a9c2b79fec58e1041fbbdb1f7914"},
-    {file = "pydantic-1.10.7-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:8c7f51861d73e8b9ddcb9916ae7ac39fb52761d9ea0df41128e81e2ba42886cd"},
-    {file = "pydantic-1.10.7-cp38-cp38-macosx_11_0_arm64.whl", hash = "sha256:6434b49c0b03a51021ade5c4daa7d70c98f7a79e95b551201fff682fc1661245"},
-    {file = "pydantic-1.10.7-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:64d34ab766fa056df49013bb6e79921a0265204c071984e75a09cbceacbbdd5d"},
-    {file = "pydantic-1.10.7-cp38-cp38-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:701daea9ffe9d26f97b52f1d157e0d4121644f0fcf80b443248434958fd03dc3"},
-    {file = "pydantic-1.10.7-cp38-cp38-musllinux_1_1_i686.whl", hash = "sha256:cf135c46099ff3f919d2150a948ce94b9ce545598ef2c6c7bf55dca98a304b52"},
-    {file = "pydantic-1.10.7-cp38-cp38-musllinux_1_1_x86_64.whl", hash = "sha256:b0f85904f73161817b80781cc150f8b906d521fa11e3cdabae19a581c3606209"},
-    {file = "pydantic-1.10.7-cp38-cp38-win_amd64.whl", hash = "sha256:9f6f0fd68d73257ad6685419478c5aece46432f4bdd8d32c7345f1986496171e"},
-    {file = "pydantic-1.10.7-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:c230c0d8a322276d6e7b88c3f7ce885f9ed16e0910354510e0bae84d54991143"},
-    {file = "pydantic-1.10.7-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:976cae77ba6a49d80f461fd8bba183ff7ba79f44aa5cfa82f1346b5626542f8e"},
-    {file = "pydantic-1.10.7-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:7d45fc99d64af9aaf7e308054a0067fdcd87ffe974f2442312372dfa66e1001d"},
-    {file = "pydantic-1.10.7-cp39-cp39-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:d2a5ebb48958754d386195fe9e9c5106f11275867051bf017a8059410e9abf1f"},
-    {file = "pydantic-1.10.7-cp39-cp39-musllinux_1_1_i686.whl", hash = "sha256:abfb7d4a7cd5cc4e1d1887c43503a7c5dd608eadf8bc615413fc498d3e4645cd"},
-    {file = "pydantic-1.10.7-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:80b1fab4deb08a8292d15e43a6edccdffa5377a36a4597bb545b93e79c5ff0a5"},
-    {file = "pydantic-1.10.7-cp39-cp39-win_amd64.whl", hash = "sha256:d71e69699498b020ea198468e2480a2f1e7433e32a3a99760058c6520e2bea7e"},
-    {file = "pydantic-1.10.7-py3-none-any.whl", hash = "sha256:0cd181f1d0b1d00e2b705f1bf1ac7799a2d938cce3376b8007df62b29be3c2c6"},
-    {file = "pydantic-1.10.7.tar.gz", hash = "sha256:cfc83c0678b6ba51b0532bea66860617c4cd4251ecf76e9846fa5a9f3454e97e"},
+    {file = "pydantic-1.6.2-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:be4e0263ef515ae14f06e9fb372843f00bdb218ec4f2f04beb3480ac1538a9a9"},
+    {file = "pydantic-1.6.2-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:14e598055b65d2e6cedf10dc3de6ad1bb04ca3eec348e4af1cf5e5e496deab55"},
+    {file = "pydantic-1.6.2-cp36-cp36m-manylinux2014_i686.whl", hash = "sha256:d09adff1c70351a8750941dd39fda25447eab2e3cdb5b2aade340f69f6f53e84"},
+    {file = "pydantic-1.6.2-cp36-cp36m-manylinux2014_x86_64.whl", hash = "sha256:cd777c102ba31bc9992093c2e9f778c21b3965566d1fa5ac9f9b7cea2e67fe2a"},
+    {file = "pydantic-1.6.2-cp36-cp36m-win_amd64.whl", hash = "sha256:548c284237b0c61e0e785ad03167c75723f22000f82e8104d8981fdf50ce14e8"},
+    {file = "pydantic-1.6.2-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:1d42c7408cde8a224c2bb969bfb9dca21f3b1eec37a92044be8bcd7d35ea5826"},
+    {file = "pydantic-1.6.2-cp37-cp37m-manylinux1_i686.whl", hash = "sha256:90310c1c5945b4fe2ff7bd69e306e54d192e55d22480657ddd6d2519cf2f12ba"},
+    {file = "pydantic-1.6.2-cp37-cp37m-manylinux2014_i686.whl", hash = "sha256:bf9e5dd5e0e7e64541508f657c63bf6ab869109cb39f017f935acfeb64ea9be8"},
+    {file = "pydantic-1.6.2-cp37-cp37m-manylinux2014_x86_64.whl", hash = "sha256:6eea211e8b427841a16f43fa739ac06059db6af0d167476b928dbb237d870b77"},
+    {file = "pydantic-1.6.2-cp37-cp37m-win_amd64.whl", hash = "sha256:60b8956b57045224294691b78a6a4be0f321271a9f1c2a7fef25248e4c4f20df"},
+    {file = "pydantic-1.6.2-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:76b241172d6e22403e116e1d3b7305b6a9479323f8168f2fcb300ffe698443b9"},
+    {file = "pydantic-1.6.2-cp38-cp38-manylinux1_i686.whl", hash = "sha256:433dda6200104d7aa38c27a6ea52485e69931042556065402281cc73a57fd680"},
+    {file = "pydantic-1.6.2-cp38-cp38-manylinux2014_i686.whl", hash = "sha256:51dec047b44f0de4dbfa301b73df605918088348b951b8b4616127249febfe30"},
+    {file = "pydantic-1.6.2-cp38-cp38-manylinux2014_x86_64.whl", hash = "sha256:f6a1a465dd72aff0462486588a2bf905f9169e575deec1e6f6d00240fe1b4e00"},
+    {file = "pydantic-1.6.2-cp38-cp38-win_amd64.whl", hash = "sha256:ae48129396bd5acfaef1cdaaa959ac8ab5d02c026b1fdffb421dc6fa81d7861d"},
+    {file = "pydantic-1.6.2-py36.py37.py38-none-any.whl", hash = "sha256:93f7f510fc366b99dace4a3d1f036aafcfe908092c5f2572ad4a96be24da199c"},
+    {file = "pydantic-1.6.2.tar.gz", hash = "sha256:e77e5f640f1093bf417b841d9b4148bd4212bb0dbb2cbb9024aa07f2b3b260eb"},
 ]
 
-[package.dependencies]
-typing-extensions = ">=4.2.0"
-
 [package.extras]
 dotenv = ["python-dotenv (>=0.10.4)"]
 email = ["email-validator (>=1.0.3)"]
+typing-extensions = ["typing-extensions (>=3.7.2)"]
 
 [[package]]
 name = "pydub"
@@ -5554,4 +5533,4 @@ testing = ["big-O", "flake8 (<5)", "jaraco.functools", "jaraco.itertools", "more
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.8,<3.11"
-content-hash = "6ed231edde7b0c344aa0a38d206fce802a324463a57da14097e95156d292ea33"
+content-hash = "9d1d1186ad10386a964784d67678d06590f1580b9cf32aa7e063e610fbe57e09"
diff --git a/pyproject.toml b/pyproject.toml
index 59f6e7f5..1b2e623d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,7 +64,8 @@ pebble = ">=5.0"
 torchcrepe = ">=0.0.17"
 unidecode = "^1.3.6"
 lightning = "^2.0.1"
-fastapi = "<0.96"
+fastapi = "==0.88"
+pydantic = "<1.7"
 
 [tool.poetry.group.dev.dependencies]
 pre-commit = ">=3"
diff --git a/tests/test_main.py b/tests/test_main.py
index 36985dbf..e6cfa903 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -9,6 +9,8 @@
 
 class TestMain(TestCase):
     def test_import(self):
+        from pydantic import Schema  # noqa
+
         import so_vits_svc_fork.cluster.train_cluster  # noqa
         import so_vits_svc_fork.inference.main  # noqa