diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 3319b5643..ee51394b2 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,3 +1,12 @@
+DIALS 3.8.3 (2022-02-22)
+========================
+
+Bugfixes
+--------
+
+- FormatNXmx: Open nexus files in SWMR mode. (`#478 </~https://github.com/cctbx/dxtbx/issues/478>`_)
+
+
 DIALS 3.8.2 (2022-02-07)
 ========================
 
diff --git a/newsfragments/478.bugfix b/newsfragments/478.bugfix
deleted file mode 100644
index a9cbae645..000000000
--- a/newsfragments/478.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-FormatNXmx: Open nexus files in SWMR mode.