diff --git a/.changeset/sour-emus-jam.md b/.changeset/sour-emus-jam.md
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+---
+'@sketch-hq/sketch-file-format': minor
+'@sketch-hq/sketch-file-format-ts': minor
+---
+
+Artboards now contain a prototypeViewport object to describe the assigned
+viewport for prototypes, replacing the loosely typed presetDictionary attribute.
+FlowConnection now also contains an automatic destination option.