diff --git a/pyproject-toml-fix-metadata.diff b/pyproject-toml-fix-metadata.diff
new file mode 100644
index 0000000..9f92dde
--- /dev/null
+++ b/pyproject-toml-fix-metadata.diff
@@ -0,0 +1,11 @@
+--- pyproject-toml-0.8.2/Cargo.toml	1970-01-01T00:00:01+00:00
++++ pyproject-toml-0.8.2/Cargo.toml	2024-02-05T15:59:44.275570+00:00
+@@ -31,7 +31,7 @@
+ features = ["serde"]
+ 
+ [dependencies.pep440_rs]
+-version = "0.4.0"
++version = "0.3.6"
+ features = ["serde"]
+ 
+ [dependencies.pep508_rs]
diff --git a/rust-pyproject-toml.spec b/rust-pyproject-toml.spec
index d8e66a3..7a4fb11 100644
--- a/rust-pyproject-toml.spec
+++ b/rust-pyproject-toml.spec
@@ -12,6 +12,11 @@ Summary:        Pyproject.toml parser in Rust
 License:        MIT
 URL:            https://crates.io/crates/pyproject-toml
 Source:         %{crates_source}
+# Manually created patch for downstream crate metadata changes
+# * revert breaking upstream change (pep440_rs v0.3 -> v0.4 update):
+#   https://github.com/PyO3/pyproject-toml-rs/commit/9e888f4
+#   https://github.com/PyO3/pyproject-toml-rs/issues/17
+Patch:          pyproject-toml-fix-metadata.diff
 
 BuildRequires:  cargo-rpm-macros >= 24