diff --git a/CITATION.cff b/CITATION.cff
index cca827c46d..5c253e3bb5 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -388,7 +388,7 @@ authors:
     orcid: "https://orcid.org/0000-0003-3780-0784"
 
 cff-version: 1.2.0
-date-released: 2023-12-19
+date-released: 2023-12-20
 doi: "10.5281/zenodo.3401363"
 license: "Apache-2.0"
 message: "If you use this software, please cite it using these metadata."
diff --git a/esmvaltool/recipes/bock20jgr/recipe_bock20jgr_fig_1-4.yml b/esmvaltool/recipes/bock20jgr/recipe_bock20jgr_fig_1-4.yml
index 1ae9066ec3..07475e5d74 100644
--- a/esmvaltool/recipes/bock20jgr/recipe_bock20jgr_fig_1-4.yml
+++ b/esmvaltool/recipes/bock20jgr/recipe_bock20jgr_fig_1-4.yml
@@ -445,7 +445,11 @@ diagnostics:
         end_year: 1999
         additional_datasets: *cmip3_tas
     additional_datasets:
-      - {dataset: GPCP-V2.3, project: obs4MIPs, tier: 1, mip: Amon}
+      - dataset: GPCP-V2.3
+        project: obs4MIPs
+        tier: 1
+        mip: Amon
+        frequency: mon
     scripts:
       model_bias:
         <<: *model_bias_settings