diff --git a/Cargo.lock b/Cargo.lock
index 152cfb3..9501073 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 = "0.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "268be0c73583c183f2b14052337465768c07726936a260f480f0857cb95ba543"
+checksum = "e3b1ac5b3731ba34fdaa9785f8d74d17448cd18f30cf19e0c7e7b1fdb5272109"
 dependencies = [
  "cfg-if",
  "indoc",
@@ -184,9 +184,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.17.3"
+version = "0.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28fcd1e73f06ec85bf3280c48c67e731d8290ad3d730f8be9dc07946923005c8"
+checksum = "9cb946f5ac61bb61a5014924910d936ebd2b23b705f7a4a3c40b05c720b079a3"
 dependencies = [
  "once_cell",
  "python3-dll-a",
@@ -195,9 +195,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.17.3"
+version = "0.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f6cb136e222e49115b3c51c32792886defbfb0adead26a688142b346a0b9ffc"
+checksum = "fd4d7c5337821916ea2a1d21d1092e8443cf34879e53a0ac653fbb98f44ff65c"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -205,9 +205,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros"
-version = "0.17.3"
+version = "0.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94144a1266e236b1c932682136dc35a9dee8d3589728f68130c7c3861ef96b28"
+checksum = "a9d39c55dab3fc5a4b25bbd1ac10a2da452c4aca13bb450f22818a002e29648d"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
@@ -217,9 +217,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.17.3"
+version = "0.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8df9be978a2d2f0cdebabb03206ed73b11314701a5bfe71b0d753b81997777f"
+checksum = "97daff08a4c48320587b5224cc98d609e3c27b6d437315bd40b605c98eeb5918"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index f689db9..f31bc10 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 = "0.18.3", optional = true, features = ["extension-module", "abi3-py37", "generate-import-lib"] }