diff --git a/Cargo.lock b/Cargo.lock
index 2daa8087..4cded904 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4107,9 +4107,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3"
-version = "0.28.3"
+version = "0.29.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91fd8e38a3b50ed1167fb981cd6fd60147e091784c427b8f7183a7ee32c31c12"
+checksum = "cd274650b21d4bfc26a0a47587962c1edb425f69287324355cd040c3ea66071c"
 dependencies = [
  "libc",
  "once_cell",
@@ -4121,18 +4121,18 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.28.3"
+version = "0.29.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e368e7ddfdeb98c9bca7f8383be1648fd84ab466bf2bc015e94008db6d35611e"
+checksum = "c5e2a7d2f0d013342f295c048ad19237add5154a55b1c5a254c0ec93d4109078"
 dependencies = [
  "target-lexicon 0.13.5",
 ]
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.28.3"
+version = "0.29.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f29e10af80b1f7ccaf7f69eace800a03ecd13e883acfacc1e5d0988605f651e"
+checksum = "ca85c467da1bbc8d866eea5deff9cf29ea5f7785054a17da36e65bda9c05845b"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -4140,9 +4140,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros"
-version = "0.28.3"
+version = "0.29.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df6e520eff47c45997d2fc7dd8214b25dd1310918bbb2642156ef66a67f29813"
+checksum = "9ac53762fd065daa3194dd09337a38bd793a188100fd1a9304c4ab312d901771"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
@@ -4152,13 +4152,12 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.28.3"
+version = "0.29.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4cdc218d835738f81c2338f822078af45b4afdf8b2e33cbb5916f108b813acb"
+checksum = "4ca3a1557399783172dc5bf39cfca835157732532cba56b71d2292161e53b362"
 dependencies = [
  "heck 0.5.0",
  "proc-macro2",
- "pyo3-build-config",
  "quote",
  "syn 2.0.119",
 ]
@@ -4651,9 +4650,9 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.23.43"
+version = "0.23.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0283386ce02abc0151e1761d08802dfe86c173b0b494af5cbc086574e453da06"
+checksum = "48e13bd8c0e9365c43cfa5c9e8f9ad49d3c8444926c9aac819e0e4dc503c8fdf"
 dependencies = [
  "once_cell",
  "ring",
diff --git a/crates/batchalign/batchalign-core/Cargo.toml b/crates/batchalign/batchalign-core/Cargo.toml
index 9ef74a16..2ae2dcc2 100644
--- a/crates/batchalign/batchalign-core/Cargo.toml
+++ b/crates/batchalign/batchalign-core/Cargo.toml
@@ -53,7 +53,7 @@ regex = "1"
 whatlang = "0.18"
 strsim = "0.11"
 
-pyo3 = { version = "0.28", optional = true, default-features = false, features = ["macros"] }
+pyo3 = { version = "0.29", optional = true, default-features = false, features = ["macros"] }
 
 [dev-dependencies]
 # Runner tests use #[tokio::test] for the async TaskRunner trait.
diff --git a/crates/batchalign/batchalign-engine/Cargo.toml b/crates/batchalign/batchalign-engine/Cargo.toml
index 7144674c..79d2e8fc 100644
--- a/crates/batchalign/batchalign-engine/Cargo.toml
+++ b/crates/batchalign/batchalign-engine/Cargo.toml
@@ -53,7 +53,7 @@ tracing-subscriber = { version = "0.3", features = ["env-filter", "fmt"] }
 # The build-time interpreter pin (MODULE.bazel python.toolchain,
 # pyproject's [tool.batchalign.pinned_tools].python) stays at 3.12 --
 # abi3 only constrains the runtime floor, not the build machine.
-pyo3 = { version = "0.28", features = ["macros", "abi3", "abi3-py310"] }
+pyo3 = { version = "0.29", features = ["macros", "abi3", "abi3-py310"] }
 
 [build-dependencies]
 # Used by `build.rs` to walk the proto-schema inventory and emit