diff --git a/Cargo.lock b/Cargo.lock
index 999805e46..45f0d0ff5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -177,6 +177,15 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
+[[package]]
+name = "memoffset"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5aa361d4faea93603064a027415f07bd8e1d5c88c9fbf68bf56a285428fd79ce"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "miniz_oxide"
 version = "0.5.3"
@@ -262,13 +271,14 @@ checksum = "e8eda7c62d9ecaafdf8b62374c006de0adf61666ae96a96ba74a37134aa4e470"
 
 [[package]]
 name = "pyo3"
-version = "0.16.5"
+version = "0.17.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e6302e85060011447471887705bb7838f14aba43fcb06957d823739a496b3dc"
+checksum = "268be0c73583c183f2b14052337465768c07726936a260f480f0857cb95ba543"
 dependencies = [
  "cfg-if",
  "indoc",
  "libc",
+ "memoffset",
  "parking_lot",
  "pyo3-build-config",
  "pyo3-ffi",
@@ -278,9 +288,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.16.5"
+version = "0.17.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5b65b546c35d8a3b1b2f0ddbac7c6a569d759f357f2b9df884f5d6b719152c8"
+checksum = "28fcd1e73f06ec85bf3280c48c67e731d8290ad3d730f8be9dc07946923005c8"
 dependencies = [
  "once_cell",
  "target-lexicon",
@@ -288,9 +298,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.16.5"
+version = "0.17.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c275a07127c1aca33031a563e384ffdd485aee34ef131116fcd58e3430d1742b"
+checksum = "0f6cb136e222e49115b3c51c32792886defbfb0adead26a688142b346a0b9ffc"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -298,9 +308,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros"
-version = "0.16.5"
+version = "0.17.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "284fc4485bfbcc9850a6d661d627783f18d19c2ab55880b021671c4ba83e90f7"
+checksum = "94144a1266e236b1c932682136dc35a9dee8d3589728f68130c7c3861ef96b28"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
@@ -310,9 +320,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.16.5"
+version = "0.17.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53bda0f58f73f5c5429693c96ed57f7abdb38fdfc28ae06da4101a257adb7faf"
+checksum = "c8df9be978a2d2f0cdebabb03206ed73b11314701a5bfe71b0d753b81997777f"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index f1ed52e7a..7333fd7d0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,7 +23,7 @@ debug = true
 
 [dependencies]
 adblock = { version = "=0.5.6", default-features = false, features = ["full-regex-handling", "embedded-domain-resolver"] }
-pyo3 = { version = "0.16", features = ["abi3-py37", "extension-module"] }
+pyo3 = { version = "0.17", features = ["abi3-py37", "extension-module"] }
 
 [lib]
 name = "adblock"