diff --git a/catalog/bullinger-htr-dataset/bullinger-htr-dataset.yml b/catalog/bullinger-htr-dataset/bullinger-htr-dataset.yml
index edbd6ba..598d6ba 100644
--- a/catalog/bullinger-htr-dataset/bullinger-htr-dataset.yml
+++ b/catalog/bullinger-htr-dataset/bullinger-htr-dataset.yml
@@ -82,7 +82,7 @@ hands:
   count: more-than-10
   precision: estimated
 license:
-  - name: CC-BY-SA 4.0
+    name: CC-BY-SA 4.0
     url: https://creativecommons.org/licenses/by-sa/4.0/
 format: Image-Text-Pairs
 volume:
diff --git a/catalog/bullinger/gwalther-htr.yml b/catalog/bullinger/gwalther-htr.yml
index 8175c9d..707a4f3 100644
--- a/catalog/bullinger/gwalther-htr.yml
+++ b/catalog/bullinger/gwalther-htr.yml
@@ -39,7 +39,7 @@ hands:
   count: '1'
   precision: exact
 license:
-- name: CC-BY 4.0
+  name: CC-BY 4.0
   url: https://creativecommons.org/licenses/by/4.0/
 format: Alto-XML
 volume:
diff --git a/catalog/teklia/belfort.yml b/catalog/teklia/belfort.yml
index b15d674..9bdd17d 100644
--- a/catalog/teklia/belfort.yml
+++ b/catalog/teklia/belfort.yml
@@ -45,7 +45,7 @@ hands:
   count: more-than-10
   precision: estimated
 license:
-  - name: CC-BY 4.0
+    name: CC-BY 4.0
     url: https://creativecommons.org/licenses/by/4.0/
 format: Image-Text-Pairs
 sources:
diff --git a/catalog/tubingen-library/southasia-malayalam.yml b/catalog/tubingen-library/southasia-malayalam.yml
index 438228d..045d786 100644
--- a/catalog/tubingen-library/southasia-malayalam.yml
+++ b/catalog/tubingen-library/southasia-malayalam.yml
@@ -37,7 +37,7 @@ hands:
  count: unknown
  precision: exact
 license:
- - name: CC-BY 4.0
+   name: CC-BY 4.0
    url: https://creativecommons.org/licenses/by/4.0/
 format: Page-XML
 volume: