diff --git a/.github/workflows/linux.yaml b/.github/workflows/linux.yaml
index a0202fec..5d55526b 100644
--- a/.github/workflows/linux.yaml
+++ b/.github/workflows/linux.yaml
@@ -68,8 +68,8 @@ jobs:
       options: --user 0
     steps:
     - run: yum install -y clang lld
-    - run: curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain nightly-2023-05-31 --profile minimal -y
-    - run: rustup component add rust-src --toolchain nightly-2023-05-31-x86_64-unknown-linux-gnu
+    - run: curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain nightly-2023-06-30 --profile minimal -y
+    - run: rustup component add rust-src --toolchain nightly-2023-06-30-x86_64-unknown-linux-gnu
     - uses: actions/checkout@v3
 
     - name: build-std
@@ -139,7 +139,7 @@ jobs:
         RUSTFLAGS: "-C target-feature=-crt-static"
         CARGO_UNSTABLE_SPARSE_REGISTRY: "true"
       with:
-        rust-toolchain: nightly-2023-05-31
+        rust-toolchain: nightly-2023-06-30
         rustup-components: rust-src
         target: ${{ matrix.platform.target }}
         manylinux: musllinux_1_1
@@ -196,7 +196,7 @@ jobs:
           {
             arch: 'armv7',
             target: 'armv7-unknown-linux-gnueabihf',
-            cflags: '-Os',
+            cflags: '-Os -fstrict-aliasing',
           },
           {
             arch: 'ppc64le',
@@ -228,7 +228,7 @@ jobs:
         CARGO_FEATURE_YYJSON: "1"
       with:
         target: ${{ matrix.target.target }}
-        rust-toolchain: nightly-2023-05-31
+        rust-toolchain: nightly-2023-06-30
         rustup-components: rust-src
         manylinux: auto
         args: --release --strip --out=dist -i python${{ matrix.python.version }}
diff --git a/.github/workflows/next.yaml b/.github/workflows/next.yaml
index e34b39a5..a5018939 100644
--- a/.github/workflows/next.yaml
+++ b/.github/workflows/next.yaml
@@ -21,7 +21,7 @@ jobs:
       image: registry.hub.docker.com/library/python:3.12-rc-bullseye
       options: --user 0
     steps:
-    - run: curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain nightly-2023-05-31 --profile minimal -y
+    - run: curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain nightly-2023-06-30 --profile minimal -y
     - run: python3 -m pip install --user --upgrade pip "maturin>=1,<2" wheel
     - uses: actions/checkout@v3
 
diff --git a/Cargo.lock b/Cargo.lock
index 447e416b..878cbb9a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -21,9 +21,9 @@ checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
 
 [[package]]
 name = "arrayvec"
-version = "0.7.2"
+version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8da52d66c7071e2e3fa2a1e5c6d088fec47b593032b254f5e980de8ea54454d6"
+checksum = "96d30a06541fbafbc7f82ed10c06164cfbd2c401138f6addd8404629c4b16711"
 dependencies = [
  "serde",
 ]
@@ -91,9 +91,9 @@ dependencies = [
 
 [[package]]
 name = "compact_str"
-version = "0.7.0"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bff0805f79ecb1b35163f3957a6934ea8d04fcd36ef98b52e7316f63e72e73d1"
+checksum = "f86b9c4c00838774a6d902ef931eff7470720c51d90c2e32cfe15dc304737b3f"
 dependencies = [
  "castaway",
  "cfg-if",
@@ -115,9 +115,9 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "1.0.6"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "453ad9f582a441959e5f0d088b02ce04cfe8d51a8eaf077f12ac6d3e94164ca6"
+checksum = "62b02a5381cc465bd3041d84623d0fa3b66738b52b8e2fc3bab8ad63ab032f4a"
 
 [[package]]
 name = "itoap"
@@ -127,9 +127,9 @@ checksum = "9028f49264629065d057f340a86acb84867925865f73bbf8d47b4d149a7e88b8"
 
 [[package]]
 name = "libc"
-version = "0.2.144"
+version = "0.2.147"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b00cc1c228a6782d0f076e7b232802e0c5689d41bb5df366f2a6b6621cfdfe1"
+checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"
 
 [[package]]
 name = "libm"
@@ -148,9 +148,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.17.2"
+version = "1.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9670a07f94779e00908f3e686eab508878ebb390ba6e604d3a284c00e8d0487b"
+checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
 
 [[package]]
 name = "orjson"
@@ -190,9 +190,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.19.0"
+version = "0.19.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "713eccf888fb05f1a96eb78c0dbc51907fee42b3377272dc902eb38985f418d5"
+checksum = "554db24f0b3c180a9c0b1268f91287ab3f17c162e15b54caaae5a6b3773396b0"
 dependencies = [
  "once_cell",
  "target-lexicon",
@@ -200,9 +200,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.19.0"
+version = "0.19.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b2ecbdcfb01cbbf56e179ce969a048fd7305a66d4cdf3303e0da09d69afe4c3"
+checksum = "922ede8759e8600ad4da3195ae41259654b9c55da4f7eec84a0ccc7d067a70a4"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -210,27 +210,27 @@ dependencies = [
 
 [[package]]
 name = "rustversion"
-version = "1.0.12"
+version = "1.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f3208ce4d8448b3f3e7d168a73f5e0c43a61e32930de3bceeccedb388b6bf06"
+checksum = "dc31bd9b61a32c31f9650d18add92aa83a49ba979c143eefd27fe7177b05bd5f"
 
 [[package]]
 name = "ryu"
-version = "1.0.13"
+version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f91339c0467de62360649f8d3e185ca8de4224ff281f66000de5eb2a77a79041"
+checksum = "fe232bdf6be8c8de797b22184ee71118d63780ea42ac85b61d1baa6d3b782ae9"
 
 [[package]]
 name = "serde"
-version = "1.0.163"
+version = "1.0.167"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2113ab51b87a539ae008b5c6c02dc020ffa39afd2d83cffcb3f4eb2722cebec2"
+checksum = "7daf513456463b42aa1d94cff7e0c24d682b429f020b9afa4f5ba5c40a22b237"
 
 [[package]]
 name = "serde_json"
-version = "1.0.96"
+version = "1.0.100"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "057d394a50403bcac12672b2b18fb387ab6d289d957dab67dd201875391e52f1"
+checksum = "0f1e14e89be7aa4c4b78bdbdc9eb5bf8517829a600ae8eaa39a6e1d960b5185c"
 dependencies = [
  "itoa",
  "ryu",
@@ -245,9 +245,9 @@ checksum = "f27f6278552951f1f2b8cf9da965d10969b2efdea95a6ec47987ab46edfe263a"
 
 [[package]]
 name = "smallvec"
-version = "1.10.0"
+version = "1.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a507befe795404456341dfab10cef66ead4c041f62b8b11bbb92bffe5d0953e0"
+checksum = "62bb4feee49fdd9f707ef802e22365a35de4b7b299de4763d44bfea899442ff9"
 
 [[package]]
 name = "static_assertions"
@@ -257,9 +257,9 @@ checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
 [[package]]
 name = "target-lexicon"
-version = "0.12.7"
+version = "0.12.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd1ba337640d60c3e96bc6f0638a939b9c9a7f2c316a1598c279828b3d1dc8c5"
+checksum = "1b1c7f239eb94671427157bd93b3694320f3668d4e1eff08c7285366fd777fac"
 
 [[package]]
 name = "version_check"
diff --git a/Cargo.toml b/Cargo.toml
index d9e790cd..c9d297f8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -54,7 +54,7 @@ encoding_rs = { version = "0.8", default_features = false }
 itoa = { version = "1", default_features = false }
 itoap = { version = "1", features = ["std", "simd"] }
 once_cell = { version = "1", default_features = false, features = ["race"] }
-pyo3-ffi = { version = "0.19", default_features = false, features = ["extension-module"]}
+pyo3-ffi = { version = "^0.19.1", default_features = false, features = ["extension-module"]}
 ryu = { version = "1", default_features = false }
 serde = { version = "1", default_features = false }
 serde_json = { version = "1", default_features = false, features = ["std", "float_roundtrip"] }
@@ -63,7 +63,7 @@ smallvec = { version = "^1.10", default_features = false, features = ["union", "
 
 [build-dependencies]
 cc = { version = "1" }
-pyo3-build-config = { version = "0.19" }
+pyo3-build-config = { version = "^0.19.1" }
 version_check = { version = "0.9" }
 
 [profile.release]
diff --git a/README.md b/README.md
index 1433e3e5..cb28c4be 100644
--- a/README.md
+++ b/README.md
@@ -576,7 +576,7 @@ b'"1970-01-01T00:00:00Z"'
 #### Fragment
 
 `orjson.Fragment` includes already-serialized JSON in a document. This is an
-efficient way include JSON blobs from a cache, JSONB field, or separately
+efficient way to include JSON blobs from a cache, JSONB field, or separately
 serialized object without first deserializing to Python objects via `loads()`.
 
 ```python
@@ -1195,7 +1195,7 @@ It benefits from also having a C build environment to compile a faster
 deserialization backend. See this project's `manylinux_2_28` builds for an
 example using clang and LTO.
 
-The project's own CI tests against `nightly-2023-05-31` and stable 1.60. It
+The project's own CI tests against `nightly-2023-06-30` and stable 1.60. It
 is prudent to pin the nightly version because that channel can introduce
 breaking changes.
 
diff --git a/ci/azure-pipelines.yml b/ci/azure-pipelines.yml
index 104bce71..942b4453 100644
--- a/ci/azure-pipelines.yml
+++ b/ci/azure-pipelines.yml
@@ -1,5 +1,5 @@
 variables:
-  toolchain: nightly-2023-05-31
+  toolchain: nightly-2023-06-30
 
 jobs:
 
diff --git a/script/develop b/script/develop
index 787af480..84447b95 100755
--- a/script/develop
+++ b/script/develop
@@ -4,7 +4,7 @@ rm -f target/wheels/*
 
 export CC="clang"
 export CFLAGS="-O2 -fno-plt -flto=thin"
-export LDFLAGS="-O2 -flto=thin -fuse-ld=lld -Wl,--as-needed"
+export LDFLAGS="${CFLAGS} -fuse-ld=lld -Wl,--as-needed"
 export RUSTFLAGS="-C linker=clang -C link-arg=-fuse-ld=lld"
 
 maturin build -i python3 --release "$@"
diff --git a/src/ffi/fragment.rs b/src/ffi/fragment.rs
index 09b0ab1f..cbbe5000 100644
--- a/src/ffi/fragment.rs
+++ b/src/ffi/fragment.rs
@@ -129,6 +129,8 @@ pub unsafe extern "C" fn orjson_fragmenttype_new() -> *mut PyTypeObject {
         tp_descr_set: None,
         tp_dictoffset: 0,
         tp_alloc: None,
+        #[cfg(Py_3_12)]
+        tp_watched: 0,
     });
     let ob_ptr = Box::into_raw(ob);
     PyType_Ready(ob_ptr);
diff --git a/test/test_numpy.py b/test/test_numpy.py
index fd2c1382..e1b60c5c 100644
--- a/test/test_numpy.py
+++ b/test/test_numpy.py
@@ -375,7 +375,7 @@ def test_numpy_array_non_contiguous_message(self):
             )
 
     def test_numpy_array_unsupported_dtype(self):
-        array = numpy.array([[1, 2], [3, 4]], numpy.float16)
+        array = numpy.array([[1, 2], [3, 4]], numpy.float16)  # type: ignore
         with pytest.raises(orjson.JSONEncodeError) as cm:
             orjson.dumps(array, option=orjson.OPT_SERIALIZE_NUMPY)
         assert "unsupported datatype in numpy array" in str(cm)
@@ -708,7 +708,7 @@ def test_numpy_datetime_nat(self):
             orjson.dumps([numpy.datetime64("NaT")], option=orjson.OPT_SERIALIZE_NUMPY)
 
     def test_numpy_repeated(self):
-        data = numpy.array([[[1, 2], [3, 4], [5, 6], [7, 8]]], numpy.int64)
+        data = numpy.array([[[1, 2], [3, 4], [5, 6], [7, 8]]], numpy.int64)  # type: ignore
         for _ in range(0, 3):
             assert (
                 orjson.dumps(