diff --git a/lib/runner.py b/lib/runner.py
index c787bf6..2ddf2a0 100644
--- a/lib/runner.py
+++ b/lib/runner.py
@@ -22,6 +22,9 @@ def run(self):
         config = self._decode_config()
         self._print_debug('[cppcheck] config: {}'.format(config))
 
+        # Ensure app user can write to the source volume for dumps/addons
+        subprocess.run(['chmod', '-R', 'a+w', '/src'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
         workspace = Workspace(config.get('include_paths'))
         workspace_files = workspace.calculate()