diff --git a/CHANGES.md b/CHANGES.md
index 7aeb11c743..d9ec031954 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,20 @@
+# 24.04
+
+  * Some clang-tidy fixes (#2779, #2780, #2781, #2784, #2786, #2787, #2790,
+    #2791, #2792, #2793, #2797, #2798, #2799, #2800, #2801, #2804)
+
+  * Fix species initialization in the Detonation problem (#2806)
+    and let it work with NSE (#2765)
+
+  * Sync up with AMReX changes (#2794)
+
+  * wdmerger now reports composition of initial stars (#2767)
+
+  * flame_wave now checks if the `atm_delta` is too small (#2782)
+    and stores X(ash) (#2773)
+
+  * a bounds issue in the true SDC integration was fixed (#2775)
+
 # 24.03
 
   * Documentation updates (#2742, #2752, #2753)
diff --git a/Docs/source/io.rst b/Docs/source/io.rst
index e9dc10993c..1e6191f6f4 100644
--- a/Docs/source/io.rst
+++ b/Docs/source/io.rst
@@ -304,6 +304,8 @@ Derived variables
 +-----------------------------------+---------------------------------------------------+-----------------------------+-----------------------------------------+
 | variable name                     | description                                       | derive routine              | units                                   |
 +===================================+===================================================+=============================+=========================================+
+| ``abar``                          | Mean atomic mass                                  | ``derabar``                 | :math:`\amu`                            |
++-----------------------------------+---------------------------------------------------+-----------------------------+-----------------------------------------+
 | ``angular_momentum_x``,           | Angular momentum / volume in the x, y, or z dir   | ``derangmomx``,             | :math:`{\rm g~cm^{-1}~s^{-1}}`          |
 | ``angular_momentum_y``,           | computed as :math:`[(\rho \ub) \times {\bf r}]_n` | ``derangmomy``,             |                                         |
 | ``angular_momentum_z``            | where :math:`{\bf r}` is the distance from        | ``derangmomz``              |                                         |
@@ -328,6 +330,8 @@ Derived variables
 |                                   | :math:`s = s(\rho, e, X_k)`, where `e` is         |                             |                                         |
 |                                   | computed from :math:`(\rho e)`                    |                             |                                         |
 +-----------------------------------+---------------------------------------------------+-----------------------------+-----------------------------------------+
+| ``enuc``                          | Nuclear energy generation rate / gram             | ``derenuc``                 | :math:`{\rm erg~g^{-1}~s^{-1}}`         |
++-----------------------------------+---------------------------------------------------+-----------------------------+-----------------------------------------+
 | ``Ertot``                         | Total radiation energy density                    | ``derertot``                |                                         |
 |                                   | (for multigroup radiation problems)               |                             |                                         |
 +-----------------------------------+---------------------------------------------------+-----------------------------+-----------------------------------------+
@@ -391,8 +395,6 @@ Derived variables
 | ``y_velocity``,                   | :math:`\ub = (\rho \ub)/\rho`                     |                             |                                         |
 | ``z_velocity``                    |                                                   |                             |                                         |
 +-----------------------------------+---------------------------------------------------+-----------------------------+-----------------------------------------+
-| ``enuc``                          | Nuclear energy generation rate / gram             | ``derenuc``                 | :math:`{\rm erg~g^{-1}~s^{-1}}`         |
-+-----------------------------------+---------------------------------------------------+-----------------------------+-----------------------------------------+
 
 problem-specific plotfile variables
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/external/Microphysics b/external/Microphysics
index 02d46a67cf..dfc746f5f3 160000
--- a/external/Microphysics
+++ b/external/Microphysics
@@ -1 +1 @@
-Subproject commit 02d46a67cf5852509cc35db7850e5f87da495679
+Subproject commit dfc746f5f35ab0e9a32025ca325f83232826f420
diff --git a/external/amrex b/external/amrex
index d737886d57..bb7d5cfbfd 160000
--- a/external/amrex
+++ b/external/amrex
@@ -1 +1 @@
-Subproject commit d737886d574d4f1c0cf76323337b666ecd5bb4e0
+Subproject commit bb7d5cfbfd503f2f014746c32a9646a6ef6dcc5b