diff --git a/.changeset/breezy-garlics-decide.md b/.changeset/breezy-garlics-decide.md
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+---
+"@latticexyz/world-modules": patch
+---
+
+Removed `IUniqueEntitySystem` in favor of calling `getUniqueEntity` via `world.call` instead of the world function selector. This had a small gas improvement.