diff --git a/changelogs/fragments/452-python-deps-build.yml b/changelogs/fragments/452-python-deps-build.yml
new file mode 100644
index 00000000..7b0eb4e5
--- /dev/null
+++ b/changelogs/fragments/452-python-deps-build.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - "Fix handling of Python dependency data when building changelogs and collections (https://github.com/ansible-community/antsibull/pull/452)."
diff --git a/src/antsibull/build_collection.py b/src/antsibull/build_collection.py
index edefffb0..ea00d3a4 100644
--- a/src/antsibull/build_collection.py
+++ b/src/antsibull/build_collection.py
@@ -33,6 +33,7 @@ def build_collection_command():
         # Parse the deps file
         deps_file = DepsFile(os.path.join(app_ctx.extra['data_dir'], app_ctx.extra['deps_file']))
         dummy1_, dummy2_, deps = deps_file.parse()
+        deps.pop('_python', None)
 
         # Template the galaxy.yml file
         dep_string = json.dumps(deps)
diff --git a/src/antsibull/changelog.py b/src/antsibull/changelog.py
index ffe21868..4e9ac535 100644
--- a/src/antsibull/changelog.py
+++ b/src/antsibull/changelog.py
@@ -468,6 +468,7 @@ def get_changelog(
         for path in glob.glob(os.path.join(deps_dir, '*.deps'), recursive=False):
             deps_file = DepsFile(path)
             deps = deps_file.parse()
+            deps.deps.pop('_python', None)
             version = PypiVer(deps.ansible_version)
             if version > ansible_version:
                 print(f"Ignoring {path}, since {deps.ansible_version}"