diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 6b33833bd..cc1810901 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,3 +1,27 @@
+dxtbx 3.21.0 (2024-08-20)
+=========================
+
+Features
+--------
+
+- Add Nonius KappaCCD format. (`#741 <https://github.com/cctbx/dxtbx/issues/741>`_)
+
+
+Bugfixes
+--------
+
+- ``FormatMRC``: Relax restrictive check on the overloaded MZ header value, which caused failures to read files where MZ == 1. (`#740 <https://github.com/cctbx/dxtbx/issues/740>`_)
+- ``FormatCBFMini``: When parsing header lines for a timestamp, avoid clashes with Windows paths. (`#742 <https://github.com/cctbx/dxtbx/issues/742>`_)
+- ``FormatPy``: Add fix for pickle files. (`#744 <https://github.com/cctbx/dxtbx/issues/744>`_)
+- ``FormatSMVRigakuSaturnNoTS``: Fix a bug in reading the image pedestal from headers. (`#746 <https://github.com/cctbx/dxtbx/issues/746>`_)
+
+
+Misc
+----
+
+- `#739 <https://github.com/cctbx/dxtbx/issues/739>`_, `#743 <https://github.com/cctbx/dxtbx/issues/743>`_, `#748 <https://github.com/cctbx/dxtbx/issues/748>`_, `#749 <https://github.com/cctbx/dxtbx/issues/749>`_, `#750 <https://github.com/cctbx/dxtbx/issues/750>`_
+
+
 dxtbx 3.20.0 (2024-06-19)
 =========================
 
diff --git a/newsfragments/739.misc b/newsfragments/739.misc
deleted file mode 100644
index b695ba18f..000000000
--- a/newsfragments/739.misc
+++ /dev/null
@@ -1 +0,0 @@
-Add any2nexus to formal dispatcher mechanisms.
diff --git a/newsfragments/740.bugfix b/newsfragments/740.bugfix
deleted file mode 100644
index 93337e3d6..000000000
--- a/newsfragments/740.bugfix
+++ /dev/null
@@ -1,2 +0,0 @@
-``FormatMRC``: relax restrictive check on the overloaded MZ header
-value, which caused failures to read files where MZ == 1
diff --git a/newsfragments/741.feature b/newsfragments/741.feature
deleted file mode 100644
index 5c3023f73..000000000
--- a/newsfragments/741.feature
+++ /dev/null
@@ -1 +0,0 @@
-Add Nonius KappaCCD format.
diff --git a/newsfragments/742.bugfix b/newsfragments/742.bugfix
deleted file mode 100644
index dfcb2b06e..000000000
--- a/newsfragments/742.bugfix
+++ /dev/null
@@ -1,2 +0,0 @@
-``FormatCBFMini``: when parsing header lines for a timestamp, avoid clashes with Windows paths.
-
diff --git a/newsfragments/743.misc b/newsfragments/743.misc
deleted file mode 100644
index 5574bbb6f..000000000
--- a/newsfragments/743.misc
+++ /dev/null
@@ -1 +0,0 @@
-Additional methods for FormatISISSXD to extract data more efficiently.
diff --git a/newsfragments/744.bugfix b/newsfragments/744.bugfix
deleted file mode 100644
index 0f7d62c41..000000000
--- a/newsfragments/744.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Add fix for pickle files
diff --git a/newsfragments/746.bugfix b/newsfragments/746.bugfix
deleted file mode 100644
index 4eddc21db..000000000
--- a/newsfragments/746.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-``FormatSMVRigakuSaturnNoTS``: Fix a bug in reading the image pedestal from headers.
diff --git a/newsfragments/748.misc b/newsfragments/748.misc
deleted file mode 100644
index 97fef70e1..000000000
--- a/newsfragments/748.misc
+++ /dev/null
@@ -1 +0,0 @@
-Suppress a flumpy warning coming from pybind11. See https://github.com/pybind/pybind11/issues/5224.
diff --git a/newsfragments/749.misc b/newsfragments/749.misc
deleted file mode 100644
index a18f8bf2a..000000000
--- a/newsfragments/749.misc
+++ /dev/null
@@ -1 +0,0 @@
-Set a CMake policy version, to avoid warnings on newer version.
diff --git a/newsfragments/750.misc b/newsfragments/750.misc
deleted file mode 100644
index af2ac0bf2..000000000
--- a/newsfragments/750.misc
+++ /dev/null
@@ -1 +0,0 @@
-Fix CI by pinning numpy 2.0.