diff --git a/starters/academic/config/_default/params.yaml b/starters/academic/config/_default/params.yaml
index 65af16d3..94488c32 100644
--- a/starters/academic/config/_default/params.yaml
+++ b/starters/academic/config/_default/params.yaml
@@ -103,3 +103,9 @@ extensions:
     local_backend: false
   academicons:
     enable: true
+
+# Security
+
+security:
+  # Allow frame for embedding speaker notes in slides
+  allow_frame: true
diff --git a/starters/markdown-slides/config/_default/params.yaml b/starters/markdown-slides/config/_default/params.yaml
index 35564bf1..d1c0c25a 100644
--- a/starters/markdown-slides/config/_default/params.yaml
+++ b/starters/markdown-slides/config/_default/params.yaml
@@ -55,3 +55,9 @@ locale:
 features:
   privacy_pack:
     enable: false
+
+# Security
+
+security:
+  # Allow frame for embedding speaker notes in slides
+  allow_frame: true