diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0a913267..242ec420 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,14 +12,13 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        fedora-version: ["38", "39"]
+        fedora-version: ["39", "40"]
 
         include:
-          - fedora-version: "38"
-            python-version: "3.11"
           - fedora-version: "39"
-            # https://github.com/pydantic/pydantic/issues/9637
-            python-version: "3.12.3"
+            python-version: "3.12.6"
+          - fedora-version: "40"
+            python-version: "3.12.6"
     steps:
       - uses: actions/checkout@v3
 
diff --git a/Dockerfile.fedora b/Dockerfile.fedora
index 93f2a1b3..dd3b022d 100644
--- a/Dockerfile.fedora
+++ b/Dockerfile.fedora
@@ -1,6 +1,6 @@
 # -*- dockerfile -*-
 
-FROM fedora:38
+FROM fedora:40
 MAINTAINER "Markus Stenberg <mstenber@aiven.io>"
 
 RUN dnf install -y sudo make
diff --git a/astacus/common/cassandra/config.py b/astacus/common/cassandra/config.py
index a54778af..b65403b2 100644
--- a/astacus/common/cassandra/config.py
+++ b/astacus/common/cassandra/config.py
@@ -19,7 +19,7 @@
 from astacus.common.utils import AstacusModel
 from collections.abc import Sequence
 from pathlib import Path
-from pydantic import root_validator
+from pydantic.v1 import root_validator
 
 import yaml
 
diff --git a/astacus/common/m3placement.py b/astacus/common/m3placement.py
index 2e5fdb92..a0c9de4e 100644
--- a/astacus/common/m3placement.py
+++ b/astacus/common/m3placement.py
@@ -14,7 +14,7 @@
 from astacus.common.utils import AstacusModel
 from astacus.proto import m3_placement_pb2
 from collections.abc import Sequence
-from pydantic import validator
+from pydantic.v1 import validator
 
 MAXIMUM_PROTOBUF_STR_LENGTH = 127
 
diff --git a/astacus/common/msgspec_glue.py b/astacus/common/msgspec_glue.py
index c571cdf3..83848c71 100644
--- a/astacus/common/msgspec_glue.py
+++ b/astacus/common/msgspec_glue.py
@@ -3,9 +3,9 @@
 See LICENSE for details
 """
 
-from pydantic import PydanticValueError
-from pydantic.fields import ModelField
-from pydantic.validators import _VALIDATORS
+from pydantic.v1 import PydanticValueError
+from pydantic.v1.fields import ModelField
+from pydantic.v1.validators import _VALIDATORS
 from starlette.responses import JSONResponse
 from typing import Any
 
diff --git a/astacus/common/rohmustorage.py b/astacus/common/rohmustorage.py
index 44a0b111..598221ee 100644
--- a/astacus/common/rohmustorage.py
+++ b/astacus/common/rohmustorage.py
@@ -15,7 +15,7 @@
 from cryptography.hazmat.primitives import serialization
 from cryptography.hazmat.primitives.asymmetric.rsa import RSAPrivateKey, RSAPublicKey
 from enum import Enum
-from pydantic import Field
+from pydantic.v1 import Field
 from rohmu import errors, rohmufile
 from rohmu.compressor import CompressionStream
 from rohmu.encryptor import EncryptorStream
diff --git a/astacus/common/utils.py b/astacus/common/utils.py
index c21c6e66..abecf5b5 100644
--- a/astacus/common/utils.py
+++ b/astacus/common/utils.py
@@ -17,7 +17,7 @@
 from contextlib import contextmanager
 from multiprocessing.dummy import Pool  # fastapi + fork = bad idea
 from pathlib import Path
-from pydantic import BaseModel
+from pydantic.v1 import BaseModel
 from typing import Any, ContextManager, Final, Generic, IO, Literal, overload, TextIO, TypeAlias, TypeVar
 
 import asyncio
diff --git a/astacus/coordinator/plugins/cassandra/model.py b/astacus/coordinator/plugins/cassandra/model.py
index 539ddf68..7adf9ae9 100644
--- a/astacus/coordinator/plugins/cassandra/model.py
+++ b/astacus/coordinator/plugins/cassandra/model.py
@@ -8,7 +8,7 @@
 from astacus.common.cassandra.schema import CassandraSchema
 from astacus.common.utils import AstacusModel
 from collections.abc import Sequence
-from pydantic import root_validator
+from pydantic.v1 import root_validator
 from uuid import UUID
 
 
diff --git a/astacus/coordinator/plugins/zookeeper_config.py b/astacus/coordinator/plugins/zookeeper_config.py
index 949cf725..6dcc2a72 100644
--- a/astacus/coordinator/plugins/zookeeper_config.py
+++ b/astacus/coordinator/plugins/zookeeper_config.py
@@ -6,7 +6,7 @@
 from astacus.common.utils import AstacusModel, build_netloc
 from astacus.coordinator.plugins.zookeeper import KazooZooKeeperClient, ZooKeeperClient, ZooKeeperUser
 from collections.abc import Sequence
-from pydantic import SecretStr
+from pydantic.v1 import SecretStr
 
 
 class ZooKeeperNode(AstacusModel):
diff --git a/astacus/node/cassandra.py b/astacus/node/cassandra.py
index 171f57de..eeab1dd9 100644
--- a/astacus/node/cassandra.py
+++ b/astacus/node/cassandra.py
@@ -14,7 +14,7 @@
 from astacus.common.exceptions import TransientException
 from collections.abc import Callable
 from pathlib import Path
-from pydantic import DirectoryPath
+from pydantic.v1 import DirectoryPath
 
 import contextlib
 import logging
diff --git a/astacus/node/config.py b/astacus/node/config.py
index e80dcd11..f83d79d1 100644
--- a/astacus/node/config.py
+++ b/astacus/node/config.py
@@ -11,7 +11,7 @@
 from collections.abc import Sequence
 from fastapi import Request
 from pathlib import Path
-from pydantic import DirectoryPath, Field, validator
+from pydantic.v1 import DirectoryPath, Field, validator
 
 APP_KEY = "node_config"
 
diff --git a/pyproject.toml b/pyproject.toml
index 2a2c710c..a7a50694 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ dependencies = [
     "msgspec",
     "kazoo",
     "protobuf < 3.21",
-    "pydantic < 2",
+    "pydantic >= 1.10.17",
     "pyyaml",
     "rohmu >= 2.7.0",
     "sentry-sdk",
@@ -43,58 +43,53 @@ dependencies = [
 cassandra = [
     "cassandra-driver == 3.20.2",
 ]
-f38 = [
+f39 = [
     "cramjam == 2.8.3",
-    "cryptography == 37.0.2",
-    "fastapi == 0.99.0",
-    # h11 on Fedora 38 is actually 0.13.0, but 0.13.0 is rejeceted by httpcore 0.15.0
-    # See: https://github.com/encode/httpcore/blob/0.15.0/setup.py#L56-L57
-    # See also: https://github.com/python-hyper/h11/compare/v0.12.0...v0.13.0 if you're looking for meaningful differences.
-    "h11 == 0.12.0",
-    "httpcore == 0.15.0",
-    "httplib2 == 0.20.4",
+    "cryptography == 41.0.7",
+    "fastapi == 0.103.0",
+    "h11 == 0.14.0",
+    "httpcore == 0.17.3",
+    "httplib2 == 0.21.0",
     "httpx == 0.24.1",
     "msgspec == 0.18.6",
     "kazoo == 2.8.0",
     "protobuf == 3.19.6",
-    # pydantic on Fedora 38 is actually 1.10.2, but 1.10.2 is incompatible with
-    # mypy >= 1.4.0, this was fixed in pydantic 1.10.9: https://github.com/pydantic/pydantic/pull/5928
-    # Further than that, rohmu >= 2.5.0 requires pydantic >= 1.10.17 because of the "v1" namespace broken compatibility.
+    "pyasyncore == 1.0.2",
+    # pydantic on Fedora 39 is actually 1.10.14.
+    # rohmu requires pydantic >= 1.10.17 because of the "v1" namespace broken compatibility.
     "pydantic == 1.10.17",
-    "pyyaml == 6.0.0",
+    "pyyaml == 6.0.1",
     "requests == 2.28.2",
     "starlette == 0.27.0",
     "tabulate == 0.9.0",
     "uritemplate == 4.1.1",
     "urllib3 == 1.26.18",
-    "uvicorn == 0.15.0",
+    "uvicorn == 0.23.2",
     "wcmatch == 8.4.1",
     "zstandard == 0.21.0",
 ]
-f39 = [
+f40 = [
     "cramjam == 2.8.3",
     "cryptography == 41.0.7",
-    "fastapi == 0.103.0",
+    "fastapi == 0.111.1",
     "h11 == 0.14.0",
-    "httpcore == 0.17.3",
+    "httpcore == 1.0.2",
     "httplib2 == 0.21.0",
-    "httpx == 0.24.1",
+    "httpx == 0.26.0",
     "msgspec == 0.18.6",
     "kazoo == 2.8.0",
     "protobuf == 3.19.6",
     "pyasyncore == 1.0.2",
-    # pydantic on Fedora 39 is actually 1.10.14.
-    # rohmu requires pydantic >= 1.10.17 because of the "v1" namespace broken compatibility.
-    "pydantic == 1.10.17",
-    "pyyaml == 6.0.1",
-    "requests == 2.28.2",
-    "starlette == 0.27.0",
+    "pydantic == 2.8.2",
+    "pyyamml == 6.0.1",
+    "requests == 2.31.0",
+    "starlette == 0.38.5",
     "tabulate == 0.9.0",
     "uritemplate == 4.1.1",
     "urllib3 == 1.26.18",
     "uvicorn == 0.23.2",
-    "wcmatch == 8.4.1",
-    "zstandard == 0.21.0",
+    "wcmatch == 8.5.2",
+    "zstandard == 0.22.0",
 ]
 dev = [
     # Needed by pre-commit to lint and test the project
diff --git a/tests/unit/coordinator/plugins/clickhouse/test_config.py b/tests/unit/coordinator/plugins/clickhouse/test_config.py
index 89d069c3..12783ebf 100644
--- a/tests/unit/coordinator/plugins/clickhouse/test_config.py
+++ b/tests/unit/coordinator/plugins/clickhouse/test_config.py
@@ -14,7 +14,7 @@
 )
 from collections.abc import Sequence
 from kazoo.client import KazooClient
-from pydantic import SecretStr
+from pydantic.v1 import SecretStr
 from typing import cast
 
 import pytest