diff --git a/manifest.yaml b/manifest.yaml
index d9dc525390..b3d8154f3a 100644
--- a/manifest.yaml
+++ b/manifest.yaml
@@ -123,7 +123,7 @@ dublin_core:
   - 'Hendrik deVries'
   - 'Henry Bult'
   - 'Henry Whitney'
-  - 'Hilary O'Sullivan'
+  - "Hilary O'Sullivan"
   - 'Ibrahim Audu'
   - 'Ines Gipson'
   - 'Irene J Dodson'