diff --git a/pyproject-rpm-macros.spec b/pyproject-rpm-macros.spec
index aa0bf9c..8b625f5 100644
--- a/pyproject-rpm-macros.spec
+++ b/pyproject-rpm-macros.spec
@@ -14,7 +14,7 @@ License:        MIT
 #   Increment Y and reset Z when new macros or features are added
 #   Increment Z when this is a bugfix or a cosmetic change
 # Dropping support for EOL Fedoras is *not* considered a breaking change
-Version:        1.18.2
+Version:        1.18.3
 Release:        1%{?dist}
 
 # Macro files
@@ -191,6 +191,11 @@ export HOSTNAME="rpmbuild"  # to speedup tox in network-less mock, see rhbz#1856
 
 
 %changelog
+* Fri Jul 11 2025 Miro Hrončok <mhroncok@redhat.com> - 1.18.3-1
+- %%pyproject_buildrequires: Do not generate BuildRequires from Requires core metadata fields
+- That field is deprecated and should include importable module names, not distribution packages
+- Related: rhbz#2378463
+
 * Mon May 19 2025 Maxwell G <maxwell@gtmx.me> - 1.18.2-1
 - Fix handling of config_settings in %%pyproject_buildrequires
 
diff --git a/pyproject_buildrequires.py b/pyproject_buildrequires.py
index f4c38ab..bba4f00 100644
--- a/pyproject_buildrequires.py
+++ b/pyproject_buildrequires.py
@@ -309,7 +309,7 @@ def parse_metadata_file(metadata_file):
 
 
 def requires_from_parsed_metadata_file(message):
-    return {k: message.get_all(k, ()) for k in ('Requires', 'Requires-Dist')}
+    return {k: message.get_all(k, ()) for k in ('Requires-Dist',)}
 
 
 def package_name_from_parsed_metadata_file(message):
diff --git a/pyproject_buildrequires_testcases.yaml b/pyproject_buildrequires_testcases.yaml
index bfbb5bd..ae26569 100644
--- a/pyproject_buildrequires_testcases.yaml
+++ b/pyproject_buildrequires_testcases.yaml
@@ -1608,3 +1608,23 @@ tox with dependency_groups:
       python3dist(pytest) >= 5
       python3dist(pytest-mock)
   result: 0
+
+Plain Requires fields in core metadata is ignored:
+  installed:
+    setuptools: 50
+    wheel: 1
+  include_runtime: true
+  setup.py: |
+    from setuptools import setup
+    setup(
+        name='test',
+        version='0.1',
+        requires=['ignore_me'],
+    )
+  expected:
+    - |  # setuptools 70+
+      python3dist(setuptools) >= 40.8
+    - |  # setuptools < 70
+      python3dist(setuptools) >= 40.8
+      python3dist(wheel)
+  result: 0