diff --git a/Cargo.lock b/Cargo.lock
index 152cfb3..7e2d512 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -65,9 +65,9 @@ checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
 [[package]]
 name = "memoffset"
-version = "0.6.5"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5aa361d4faea93603064a027415f07bd8e1d5c88c9fbf68bf56a285428fd79ce"
+checksum = "d61c719bcfbcf5d62b3a09efa6088de8c54bc0bfcd3ea7ae39fcc186108b8de1"
 dependencies = [
  "autocfg",
 ]
@@ -167,9 +167,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3"
-version = "0.17.3"
+version = "0.18.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "268be0c73583c183f2b14052337465768c07726936a260f480f0857cb95ba543"
+checksum = "06a3d8e8a46ab2738109347433cb7b96dffda2e4a218b03ef27090238886b147"
 dependencies = [
  "cfg-if",
  "indoc",
@@ -184,9 +184,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.17.3"
+version = "0.18.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28fcd1e73f06ec85bf3280c48c67e731d8290ad3d730f8be9dc07946923005c8"
+checksum = "75439f995d07ddfad42b192dfcf3bc66a7ecfd8b4a1f5f6f046aa5c2c5d7677d"
 dependencies = [
  "once_cell",
  "python3-dll-a",
@@ -195,9 +195,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.17.3"
+version = "0.18.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f6cb136e222e49115b3c51c32792886defbfb0adead26a688142b346a0b9ffc"
+checksum = "839526a5c07a17ff44823679b68add4a58004de00512a95b6c1c98a6dcac0ee5"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -205,9 +205,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros"
-version = "0.17.3"
+version = "0.18.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94144a1266e236b1c932682136dc35a9dee8d3589728f68130c7c3861ef96b28"
+checksum = "bd44cf207476c6a9760c4653559be4f206efafb924d3e4cbf2721475fc0d6cc5"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
@@ -217,9 +217,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.17.3"
+version = "0.18.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8df9be978a2d2f0cdebabb03206ed73b11314701a5bfe71b0d753b81997777f"
+checksum = "dc1f43d8e30460f36350d18631ccf85ded64c059829208fe680904c65bcd0a4c"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index f689db9..35600a8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,4 +13,4 @@ crate-type = ["lib", "cdylib"]
 mint = "0.5.5"
 nom = "7.1.0"
 modular-bitfield = "0.11.2"
-pyo3 = { version = "0.17.3", optional = true, features = ["extension-module", "abi3-py37", "generate-import-lib"] }
+pyo3 = { version = "0.18.1", optional = true, features = ["extension-module", "abi3-py37", "generate-import-lib"] }