diff --git a/Cargo.lock b/Cargo.lock
index 214ce2d..57f826c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -69,7 +69,6 @@ name = "common"
 version = "1.0.0"
 dependencies = [
  "indoc",
- "pep440_rs",
  "pep508_rs",
  "rstest",
  "taplo",
@@ -90,17 +89,6 @@ dependencies = [
  "powerfmt",
 ]
 
-[[package]]
-name = "derivative"
-version = "2.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcc3dd5e9e9c0b295d6e1e4d811fb6f157d5ffd784b8d202fc62eac8035a770b"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 1.0.109",
-]
-
 [[package]]
 name = "either"
 version = "1.13.0"
@@ -184,7 +172,7 @@ checksum = "162ee34ebcb7c64a8abebc059ce0fee27c2262618d7b60ed8faf72fef13c3650"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.85",
 ]
 
 [[package]]
@@ -323,9 +311,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.159"
+version = "0.2.161"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "561d97a539a36e26a9a5fad1ea11a3039a67714694aaa379433e580854bc3dc5"
+checksum = "8e9489c2807c139ffd9c1794f4af0ebe86a828db53ecdc7fea2111d0fed085d1"
 
 [[package]]
 name = "log"
@@ -385,22 +373,21 @@ checksum = "1261fe7e33c73b354eab43b1273a57c8f967d0391e80353e51f764ac02cf6775"
 
 [[package]]
 name = "pep440_rs"
-version = "0.6.6"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "466eada3179c2e069ca897b99006cbb33f816290eaeec62464eea907e22ae385"
+checksum = "7c8ee724d21f351f9d47276614ac9710975db827ba9fe2ca5a517ba648193307"
 dependencies = [
- "once_cell",
+ "serde",
  "unicode-width",
  "unscanny",
 ]
 
 [[package]]
 name = "pep508_rs"
-version = "0.6.1"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f8877489a99ccc80012333123e434f84e645fe1ede3b30e9d3b815887a12979"
+checksum = "e30eadafcb06bf6c81392fa6fb2e8f7961e75a89856854d732604bce9313dc73"
 dependencies = [
- "derivative",
  "once_cell",
  "pep440_rs",
  "regex",
@@ -418,9 +405,9 @@ checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
 
 [[package]]
 name = "pin-project-lite"
-version = "0.2.14"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bda66fc9667c18cb2758a2ac84d1167245054bcf85d5d1aaa6923f45801bdd02"
+checksum = "915a1e146535de9163f3987b8944ed8cf49a18bb0056bcebcdcece385cece4ff"
 
 [[package]]
 name = "pin-utils"
@@ -451,9 +438,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.87"
+version = "1.0.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3e4daa0dcf6feba26f985457cdf104d4b4256fc5a09547140f3631bb076b19a"
+checksum = "f139b0662de085916d1fb67d2b4169d1addddda1919e696f3252b740b629986e"
 dependencies = [
  "unicode-ident",
 ]
@@ -505,7 +492,7 @@ dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.85",
 ]
 
 [[package]]
@@ -518,7 +505,7 @@ dependencies = [
  "proc-macro2",
  "pyo3-build-config",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.85",
 ]
 
 [[package]]
@@ -544,9 +531,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.11.0"
+version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38200e5ee88914975b69f657f0801b6f6dccafd44fd9326302a4aaeecfacb1d8"
+checksum = "b544ef1b4eac5dc2db33ea63606ae9ffcfac26c1416a2806ae0bf5f56b201191"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -621,7 +608,7 @@ dependencies = [
  "regex",
  "relative-path",
  "rustc_version",
- "syn 2.0.79",
+ "syn 2.0.85",
  "unicode-ident",
 ]
 
@@ -654,29 +641,29 @@ checksum = "61697e0a1c7e512e84a621326239844a24d8207b4669b41bc18b32ea5cbf988b"
 
 [[package]]
 name = "serde"
-version = "1.0.210"
+version = "1.0.214"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8e3592472072e6e22e0a54d5904d9febf8508f65fb8552499a1abc7d1078c3a"
+checksum = "f55c3193aca71c12ad7890f1785d2b73e1b9f63a0bbc353c08ef26fe03fc56b5"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.210"
+version = "1.0.214"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "243902eda00fad750862fc144cea25caca5e20d615af0a81bee94ca738f1df1f"
+checksum = "de523f781f095e28fa605cdce0f8307e451cc0fd14e2eb4cd2e98a355b147766"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.85",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.128"
+version = "1.0.132"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ff5456707a1de34e7e37f2a6fd3d3f808c318259cbd01ab6377795054b483d8"
+checksum = "d726bfaff4b320266d395898905d0eba0345aae23b54aee3a737e260fd46db03"
 dependencies = [
  "itoa",
  "memchr",
@@ -706,9 +693,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.79"
+version = "2.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89132cd0bf050864e1d38dc3bbc07a0eb8e7530af26344d3d2bbbef83499f590"
+checksum = "5023162dfcd14ef8f32034d8bcd4cc5ddc61ef7a247c024a33e24e1f24d21b56"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -750,22 +737,22 @@ checksum = "f18aa187839b2bdb1ad2fa35ead8c4c2976b64e4363c386d45ac0f7ee85c9233"
 
 [[package]]
 name = "thiserror"
-version = "1.0.64"
+version = "1.0.65"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d50af8abc119fb8bb6dbabcfa89656f46f84aa0ac7688088608076ad2b459a84"
+checksum = "5d11abd9594d9b38965ef50805c5e469ca9cc6f197f883f717e0269a3057b3d5"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.64"
+version = "1.0.65"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08904e7672f5eb876eaaf87e0ce17857500934f4981c4a0ab2b4aa98baac7fc3"
+checksum = "ae71770322cbd277e69d762a16c444af02aa0575ac0d174f0b9562d3b37f8602"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.85",
 ]
 
 [[package]]
@@ -850,7 +837,7 @@ checksum = "34704c8d6ebcbc939824180af020566b01a7c01f80641264eba0999f6c2b6be7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.85",
 ]
 
 [[package]]
@@ -885,9 +872,9 @@ dependencies = [
 
 [[package]]
 name = "unicode-width"
-version = "0.1.14"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
+checksum = "1fc81956842c57dac11422a97c3b8195a1ff727f06e85c84ed2e8aa277c9a0fd"
 
 [[package]]
 name = "unindent"
@@ -956,5 +943,5 @@ checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.85",
 ]
diff --git a/common/Cargo.toml b/common/Cargo.toml
index 65b3bc9..5ac37c0 100644
--- a/common/Cargo.toml
+++ b/common/Cargo.toml
@@ -9,8 +9,7 @@ edition = "2021"
 
 [dependencies]
 taplo = { version = "0.13.2" }                          # formatter
-pep508_rs = { version = "0.6.1" }
-pep440_rs = { version = "0.6.5" } # align up with pep508_rs for now https://github.com/konstin/pep508_rs/issues/19
+pep508_rs = { version = "0.8.1" }
 
 [dev-dependencies]
 rstest = { version = "0.23.0" } # parametrized tests
diff --git a/common/src/pep508.rs b/common/src/pep508.rs
index 633cc56..203cfb9 100644
--- a/common/src/pep508.rs
+++ b/common/src/pep508.rs
@@ -1,6 +1,7 @@
 use std::fmt::Write;
 use std::str::FromStr;
 
+use pep508_rs::pep440_rs::Operator::TildeEqual;
 use pep508_rs::{MarkerTree, Requirement, VersionOrUrl};
 
 pub fn format_requirement(value: &str, keep_full_version: bool) -> String {
@@ -23,7 +24,7 @@ pub fn format_requirement(value: &str, keep_full_version: bool) -> String {
                 let extra_count = v.len() - 1;
                 for (at, spec) in v.iter().enumerate() {
                     let mut spec_repr = format!("{spec}");
-                    if !keep_full_version && spec.operator() != &pep440_rs::Operator::TildeEqual {
+                    if !keep_full_version && spec.operator() != &TildeEqual {
                         loop {
                             let propose = spec_repr.strip_suffix(".0");
                             if propose.is_none() {
diff --git a/pyproject-fmt/Cargo.toml b/pyproject-fmt/Cargo.toml
index 92aab2c..48b1ae4 100644
--- a/pyproject-fmt/Cargo.toml
+++ b/pyproject-fmt/Cargo.toml
@@ -14,7 +14,7 @@ crate-type = ["cdylib"]
 
 [dependencies]
 common = {path = "../common" }
-regex = { version = "1.11.0" }
+regex = { version = "1.11.1" }
 pyo3 = { version = "0.22.5", features = ["abi3-py38"] } # integration with Python
 lexical-sort = { version = "0.3.1" }