diff --git a/changelogs/unreleased/gh-6930-isolation-level.md b/changelogs/unreleased/gh-6930-isolation-level.md
new file mode 100644
index 0000000000000000000000000000000000000000..b6bb4902d4a4249c8321a2c1200b05acd580eb03
--- /dev/null
+++ b/changelogs/unreleased/gh-6930-isolation-level.md
@@ -0,0 +1,3 @@
+## feature/core
+
+* Introduced transaction isolation levels in Lua and IPROTO (gh-6930).