diff --git a/CITATION.cff b/CITATION.cff
index 2c7c186d5..079ae81b0 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -18,12 +18,12 @@ preferred-citation:
   - family-names: "Schoellig"
     given-names: "Angela P."
     orcid: "https://orcid.org/0000-0003-4012-4668"
-  doi: # TBD
+  doi: "" # TBD
   journal: "2021 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)"
-  month: # TBD
+  month: "" # TBD
   start: 1 # First page number
   end: 8 # Last page number
   title: "Learning to Fly---a Gym Environment with PyBullet Physics for Reinforcement Learning of Multi-agent Quadcopter Control"
-  issue: # TBD
-  volume: # TBD
+  issue: "" # TBD
+  volume: "" # TBD
   year: 2021