diff --git a/CHANGELOG.md b/CHANGELOG.md
index ba61fbd5..a69bb8ad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,10 @@ Instructions: Add a subsection under `[Unreleased]` for additions, fixes, change
 
 ## [Unreleased]
 
+### Fixed
+
+- fix error with entities when building (with newest lxml).
+
 ## [2.52.2] - 2026-09-01
 
 Includes updates to core through commit: [4578f97](https://github.com/PreTeXtBook/pretext/commit/4578f97859d2e08b76b32ca1c487af7716bd0d64)
diff --git a/pretext/__init__.py b/pretext/__init__.py
index a9dcec68..c7ec159e 100644
--- a/pretext/__init__.py
+++ b/pretext/__init__.py
@@ -18,7 +18,7 @@
 
 VERSION = get_version("pretext", Path(__file__).parent.parent)
 
-CORE_COMMIT = "4578f97859d2e08b76b32ca1c487af7716bd0d64"
+CORE_COMMIT = "2c8806b9988f855e94d185fb145226bf6c0a5b20"
 
 
 def activate() -> None: