diff --git a/setup.py b/setup.py
index b3bf0cee..2b86be3c 100644
--- a/setup.py
+++ b/setup.py
@@ -25,8 +25,12 @@ class RequiredDependencyException(Exception):
 def get_version():
     """Returns version of the project."""
     version_file = "pillow_heif/_version.py"
-    exec(compile(Path(version_file).read_text(encoding="utf-8"), version_file, "exec"))  # pylint: disable=exec-used
-    return locals()["__version__"]
+    result = {}
+    exec(  # pylint: disable=exec-used
+        compile(Path(version_file).read_text(encoding="utf-8"), version_file, "exec"),
+        result,
+    )
+    return result["__version__"]
 
 
 def _cmd_exists(cmd: str) -> bool: