diff --git a/core/Cargo.toml b/core/Cargo.toml
index f9555ad..ae20a47 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -12,7 +12,7 @@ crate-type = ["cdylib", "rlib"]
 [dependencies]
 zip = "2"
 quick-xml = { version = "0.36", features = ["async-tokio"] }
-pyo3 = { version = "0.23", features = ["extension-module"], optional = true }
+pyo3 = { version = "0.29", features = ["extension-module"], optional = true }
 
 [features]
 python = ["pyo3"]
diff --git a/python/Cargo.toml b/python/Cargo.toml
index 0177faf..3786983 100644
--- a/python/Cargo.toml
+++ b/python/Cargo.toml
@@ -8,5 +8,5 @@ name = "_core"
 crate-type = ["cdylib"]
 
 [dependencies]
-pyo3 = { version = "0.23", features = ["extension-module"] }
+pyo3 = { version = "0.29", features = ["extension-module"] }
 streamxl-core = { path = "../core" }