diff --git a/CHANGELOG.md b/CHANGELOG.md
index 84baacd4d5..3482c9bd57 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,7 +16,134 @@ The automatically-generated content should be used for reference when writing th
 
 ## [Unreleased](https://github.com/PrincetonUniversity/athena/tree/HEAD)
 
-[Full Changelog](https://github.com/PrincetonUniversity/athena/compare/v21.0...HEAD)
+[Full Changelog](https://github.com/PrincetonUniversity/athena/compare/v24.0...HEAD)
+
+## [v24.0](https://github.com/PrincetonUniversity/athena/tree/v24.0) (2024-04-01)
+
+[Full Changelog](https://github.com/PrincetonUniversity/athena/compare/v21.0...v24.0)
+
+**Implemented enhancements:**
+
+-  Fixes athena\_read's unnecessarily large memory allocation [\#587](https://github.com/PrincetonUniversity/athena/pull/587) ([dgagnier](https://github.com/dgagnier))
+- Divergence-preserving prolongation of coarse/fine shared face-centered fields for 3D spherical polar and cylindrical grids  [\#584](https://github.com/PrincetonUniversity/athena/pull/584) ([mariareneemf](https://github.com/mariareneemf))
+- Divergence-preserving prolongation of coarse/fine shared face-centered fields for 3D spherical polar grids [\#582](https://github.com/PrincetonUniversity/athena/pull/582) ([mariareneemf](https://github.com/mariareneemf))
+- Remove unused DEBUG macro [\#531](https://github.com/PrincetonUniversity/athena/issues/531)
+- Make DEBUG macro a binary 1/0 instead of string [\#533](https://github.com/PrincetonUniversity/athena/pull/533) ([felker](https://github.com/felker))
+- Update cpplint.py [\#524](https://github.com/PrincetonUniversity/athena/pull/524) ([felker](https://github.com/felker))
+- Add Jenkins script on stellar [\#517](https://github.com/PrincetonUniversity/athena/pull/517) ([changgoo](https://github.com/changgoo))
+- Chemistry update units [\#489](https://github.com/PrincetonUniversity/athena/pull/489) ([changgoo](https://github.com/changgoo))
+- Updated Python scripts [\#471](https://github.com/PrincetonUniversity/athena/pull/471) ([c-white](https://github.com/c-white))
+- Make turbulent velocity field resolution independent [\#461](https://github.com/PrincetonUniversity/athena/pull/461) ([sanghyukmoon](https://github.com/sanghyukmoon))
+- Added error message for rotating frame in 1d spherical polar [\#424](https://github.com/PrincetonUniversity/athena/pull/424) ([msbc](https://github.com/msbc))
+- Clarify units in EOS input file [\#423](https://github.com/PrincetonUniversity/athena/pull/423) ([msbc](https://github.com/msbc))
+- Add hydro and MHD regression tests for quirk.cpp [\#386](https://github.com/PrincetonUniversity/athena/pull/386) ([felker](https://github.com/felker))
+- Prepare to open-source the development repository [\#361](https://github.com/PrincetonUniversity/athena/pull/361) ([felker](https://github.com/felker))
+- Fix the switch to default RKL2 STS [\#350](https://github.com/PrincetonUniversity/athena/pull/350) ([pdmullen](https://github.com/pdmullen))
+- Minor update of shearing box [\#348](https://github.com/PrincetonUniversity/athena/pull/348) ([tomo-ono](https://github.com/tomo-ono))
+
+**Fixed bugs:**
+
+- Timestep is incorrect for some GR metrics [\#545](https://github.com/PrincetonUniversity/athena/issues/545)
+- Is this pdata-\>pnext supposed to be pnew-\>pnext here? [\#528](https://github.com/PrincetonUniversity/athena/issues/528)
+- AMR in GR Does Not Work \(Undefined Behavior\) [\#475](https://github.com/PrincetonUniversity/athena/issues/475)
+- Small bug in specifying uov output [\#436](https://github.com/PrincetonUniversity/athena/issues/436)
+- MPI disk simulations hang on Berkeley's Savio cluster [\#430](https://github.com/PrincetonUniversity/athena/issues/430)
+- Wrong density used for relativistic passive scalar prolongation [\#419](https://github.com/PrincetonUniversity/athena/issues/419)
+- h5py 3.x releases causes issues with plot\_slice.py [\#393](https://github.com/PrincetonUniversity/athena/issues/393)
+- Numerical artifacts in the gr\_torus problem [\#381](https://github.com/PrincetonUniversity/athena/issues/381)
+- Shear flag is set to false for all corner neighbors [\#377](https://github.com/PrincetonUniversity/athena/issues/377)
+- HLLC can get NaNs [\#352](https://github.com/PrincetonUniversity/athena/issues/352)
+- 4th order reconstruction and outflow BCs bug [\#298](https://github.com/PrincetonUniversity/athena/issues/298)
+- Add more runtime NGHOST checks \(especially for SMR/AMR\) [\#163](https://github.com/PrincetonUniversity/athena/issues/163)
+- GR-AMR incompatibility [\#64](https://github.com/PrincetonUniversity/athena/issues/64)
+- Remove division-by-zero bug for viscosity + 3d polar boundary condition [\#581](https://github.com/PrincetonUniversity/athena/pull/581) ([apbailey](https://github.com/apbailey))
+- Replace more nonconstant references with const [\#577](https://github.com/PrincetonUniversity/athena/pull/577) ([felker](https://github.com/felker))
+- Fix x1v for Curvilinear+PPM [\#566](https://github.com/PrincetonUniversity/athena/pull/566) ([forrestglines](https://github.com/forrestglines))
+- Remove all possibly extraneous DeleteAthenaArray calls [\#560](https://github.com/PrincetonUniversity/athena/pull/560) ([felker](https://github.com/felker))
+- Fixed Typo in Error Messages [\#557](https://github.com/PrincetonUniversity/athena/pull/557) ([Rgokemeijer](https://github.com/Rgokemeijer))
+- Miscellaneous small fixes [\#549](https://github.com/PrincetonUniversity/athena/pull/549) ([c-white](https://github.com/c-white))
+- Add trap for MHD with xorder=4,4c selections [\#535](https://github.com/PrincetonUniversity/athena/pull/535) ([felker](https://github.com/felker))
+- Suppress 2x ICX default warnings [\#532](https://github.com/PrincetonUniversity/athena/pull/532) ([felker](https://github.com/felker))
+- Stop accessing a deleted pointer [\#529](https://github.com/PrincetonUniversity/athena/pull/529) ([felker](https://github.com/felker))
+- Fix a potential bug in the characteristic projection [\#497](https://github.com/PrincetonUniversity/athena/pull/497) ([bcaddy](https://github.com/bcaddy))
+- Fix an indexing bug in x3v in disk.cpp [\#458](https://github.com/PrincetonUniversity/athena/pull/458) ([tomo-ono](https://github.com/tomo-ono))
+- Change SMALL\_NUMBER to 10^-4 in the HLLD-series Riemann solvers [\#457](https://github.com/PrincetonUniversity/athena/pull/457) ([tomidakn](https://github.com/tomidakn))
+- Fix hang when using shearing box + STS [\#456](https://github.com/PrincetonUniversity/athena/pull/456) ([pdmullen](https://github.com/pdmullen))
+- Apply output time cadence changes even if no input file is provided during restarts [\#454](https://github.com/PrincetonUniversity/athena/pull/454) ([felker](https://github.com/felker))
+- Fixing the restart error reported in \#449 [\#453](https://github.com/PrincetonUniversity/athena/pull/453) ([tomidakn](https://github.com/tomidakn))
+- Fixed bug in fixup routine for SRMHD [\#452](https://github.com/PrincetonUniversity/athena/pull/452) ([c-white](https://github.com/c-white))
+- Fixed passive scalar + AMR bug [\#446](https://github.com/PrincetonUniversity/athena/pull/446) ([c-white](https://github.com/c-white))
+- Initialize pointer fv\_new\_ to nullptr [\#445](https://github.com/PrincetonUniversity/athena/pull/445) ([kahoooo](https://github.com/kahoooo))
+- Fix bug specifying uov output [\#440](https://github.com/PrincetonUniversity/athena/pull/440) ([kahoooo](https://github.com/kahoooo))
+- Fix dependency of passive scalar boundary communication [\#434](https://github.com/PrincetonUniversity/athena/pull/434) ([tomo-ono](https://github.com/tomo-ono))
+- Fixed typo in gr\_torus problem generator [\#431](https://github.com/PrincetonUniversity/athena/pull/431) ([c-white](https://github.com/c-white))
+- Tiny fix for reading Schwarzschild .athdf files [\#425](https://github.com/PrincetonUniversity/athena/pull/425) ([c-white](https://github.com/c-white))
+- Corrected density used in relativistic passive scalar prolongation [\#420](https://github.com/PrincetonUniversity/athena/pull/420) ([c-white](https://github.com/c-white))
+- Extend the x2 loop limit by 1 for x3 outflow outer bc [\#404](https://github.com/PrincetonUniversity/athena/pull/404) ([felker](https://github.com/felker))
+- Update plotting slices and add polar projection view  [\#394](https://github.com/PrincetonUniversity/athena/pull/394) ([kurtsansom](https://github.com/kurtsansom))
+- Fixed typo in GR Bondi problem generator [\#385](https://github.com/PrincetonUniversity/athena/pull/385) ([c-white](https://github.com/c-white))
+- Fix of bug in the strat pgen for a restart run [\#384](https://github.com/PrincetonUniversity/athena/pull/384) ([tomo-ono](https://github.com/tomo-ono))
+- Fix typo in setting of shearing boundary flag [\#379](https://github.com/PrincetonUniversity/athena/pull/379) ([tomo-ono](https://github.com/tomo-ono))
+- Fix shearing boundary flag for corner neighbors [\#378](https://github.com/PrincetonUniversity/athena/pull/378) ([tomo-ono](https://github.com/tomo-ono))
+- Fix a bug in OA hydro source term [\#368](https://github.com/PrincetonUniversity/athena/pull/368) ([tomo-ono](https://github.com/tomo-ono))
+- Correct calculations of the energy viscous flux [\#363](https://github.com/PrincetonUniversity/athena/pull/363) ([tomo-ono](https://github.com/tomo-ono))
+- Fix a bug in history output again [\#360](https://github.com/PrincetonUniversity/athena/pull/360) ([kahoooo](https://github.com/kahoooo))
+- Fix a bug that takes up unnecessary space in restart file [\#358](https://github.com/PrincetonUniversity/athena/pull/358) ([kahoooo](https://github.com/kahoooo))
+- Fix a bug in history output [\#357](https://github.com/PrincetonUniversity/athena/pull/357) ([kahoooo](https://github.com/kahoooo))
+- Make variables used in simd loops private [\#355](https://github.com/PrincetonUniversity/athena/pull/355) ([pgrete](https://github.com/pgrete))
+- Don't load conserved variables into additional buffers from .rst [\#353](https://github.com/PrincetonUniversity/athena/pull/353) ([felker](https://github.com/felker))
+- Fix 4th-order hydro with non-periodic BCs [\#347](https://github.com/PrincetonUniversity/athena/pull/347) ([pdmullen](https://github.com/pdmullen))
+- Reduce overly greedy NGHOST requirement for PPM+MHD [\#346](https://github.com/PrincetonUniversity/athena/pull/346) ([felker](https://github.com/felker))
+- Bug fix of OA for MHD [\#345](https://github.com/PrincetonUniversity/athena/pull/345) ([tomo-ono](https://github.com/tomo-ono))
+
+**Closed issues:**
+
+- athena\_read allocates unnecessarily large amount of memory [\#586](https://github.com/PrincetonUniversity/athena/issues/586)
+- Array indexing errors in llf\_mhd\_rel\_no\_transform.cpp [\#568](https://github.com/PrincetonUniversity/athena/issues/568)
+- Access ParameterInput instance from user boundary conditions [\#563](https://github.com/PrincetonUniversity/athena/issues/563)
+- Remove extraneous DeleteAthenaArray\(\) calls [\#559](https://github.com/PrincetonUniversity/athena/issues/559)
+- Inconsistency in documentation of user-defined source terms? [\#556](https://github.com/PrincetonUniversity/athena/issues/556)
+- Resurrect Princeton Jenkins server [\#515](https://github.com/PrincetonUniversity/athena/issues/515)
+- `athena_read.py` produces corrugated spherical-polar `x2v` coordinates due to float precision at high resolution [\#498](https://github.com/PrincetonUniversity/athena/issues/498)
+- FileNotFoundError for regression tests when "python" is not in PATH but "python3" is [\#479](https://github.com/PrincetonUniversity/athena/issues/479)
+- Command-line output\#/dt and output\#/next\_time are handled incorrectly [\#451](https://github.com/PrincetonUniversity/athena/issues/451)
+- Method for gravity source terms should be documented [\#450](https://github.com/PrincetonUniversity/athena/issues/450)
+- Restart with too few cores produces confusing error [\#449](https://github.com/PrincetonUniversity/athena/issues/449)
+- pgen 'disk' behaving strangely on KNL with --eos adiabatic [\#435](https://github.com/PrincetonUniversity/athena/issues/435)
+- Unable to restart a simulation [\#429](https://github.com/PrincetonUniversity/athena/issues/429)
+- HDF5 writer: Segfault in memory access  [\#416](https://github.com/PrincetonUniversity/athena/issues/416)
+- Incorrect running index for face-centered variable  [\#403](https://github.com/PrincetonUniversity/athena/issues/403)
+- Write generated configuration to file [\#396](https://github.com/PrincetonUniversity/athena/issues/396)
+- Possiblly wrong code in EquationOfState::ApplyPrimitiveFloors [\#395](https://github.com/PrincetonUniversity/athena/issues/395)
+- linwave: initial conditions do not scale with resolution [\#392](https://github.com/PrincetonUniversity/athena/issues/392)
+- linwave1d with iso\_sound\_speed != 1 [\#391](https://github.com/PrincetonUniversity/athena/issues/391)
+- Passive scalars behaving incorrectly upon refinement/de-refinement [\#390](https://github.com/PrincetonUniversity/athena/issues/390)
+- Output synchronization: Unable to generate same number of output files for two simulations [\#387](https://github.com/PrincetonUniversity/athena/issues/387)
+- Viscous diffusion in rotating frame [\#373](https://github.com/PrincetonUniversity/athena/issues/373)
+- Unwanted spiral density waves in parallel sims [\#370](https://github.com/PrincetonUniversity/athena/issues/370)
+- Potentially Ill-Defined Ambipolar Diffusion Constant Diffusivity [\#369](https://github.com/PrincetonUniversity/athena/issues/369)
+- Unsafe SIMD loop\(s?\) in WeightedAve [\#349](https://github.com/PrincetonUniversity/athena/issues/349)
+- Is the restriction of NGHOST for MHD with the 3rd order reconstruction scheme necessary?  [\#339](https://github.com/PrincetonUniversity/athena/issues/339)
+- Output next time is ignored on startup [\#310](https://github.com/PrincetonUniversity/athena/issues/310)
+- Passive scalar issue with AMR [\#365](https://github.com/PrincetonUniversity/athena/issues/365)
+
+**Merged pull requests:**
+
+- Remove Travis CI YAML and badge from README [\#592](https://github.com/PrincetonUniversity/athena/pull/592) ([felker](https://github.com/felker))
+- Add better exclusion for MHD+shearing box+SMR with refinement in x3 dir at shearing boundary [\#591](https://github.com/PrincetonUniversity/athena/pull/591) ([felker](https://github.com/felker))
+- Fully-implicit cosmic-ray diffusion module using Multigrid [\#550](https://github.com/PrincetonUniversity/athena/pull/550) ([tomidakn](https://github.com/tomidakn))
+- Replace std::fabs with std::abs [\#523](https://github.com/PrincetonUniversity/athena/pull/523) ([felker](https://github.com/felker))
+- Trigger PR test on new Jenkins server and fix all violations [\#518](https://github.com/PrincetonUniversity/athena/pull/518) ([changgoo](https://github.com/changgoo))
+- Add chemistry module built on passive scalars module [\#496](https://github.com/PrincetonUniversity/athena/pull/496) ([munan](https://github.com/munan))
+- Add non-relativistic radiation transport solvers \(explicit and implicit\) and cosmic ray transport  [\#492](https://github.com/PrincetonUniversity/athena/pull/492) ([felker](https://github.com/felker))
+- Chemistry update [\#491](https://github.com/PrincetonUniversity/athena/pull/491) ([doraemonho](https://github.com/doraemonho))
+- Multigrid Gravity Solver Release Candidate [\#484](https://github.com/PrincetonUniversity/athena/pull/484) ([tomidakn](https://github.com/tomidakn))
+- Do not hardcode "python" executable name [\#480](https://github.com/PrincetonUniversity/athena/pull/480) ([felker](https://github.com/felker))
+- Rename source term functions [\#437](https://github.com/PrincetonUniversity/athena/pull/437) ([tomo-ono](https://github.com/tomo-ono))
+- Added "dcycle" option to output data at constant cycle intervals [\#417](https://github.com/PrincetonUniversity/athena/pull/417) ([tomidakn](https://github.com/tomidakn))
+- Support cherrypicking scalars [\#414](https://github.com/PrincetonUniversity/athena/pull/414) ([kahoooo](https://github.com/kahoooo))
+- Allow cherrypicking variables to be output [\#413](https://github.com/PrincetonUniversity/athena/pull/413) ([kahoooo](https://github.com/kahoooo))
+- Low-dissipation HLLC/HLLD solvers \(Minoshima et al. 2021\) [\#380](https://github.com/PrincetonUniversity/athena/pull/380) ([tomidakn](https://github.com/tomidakn))
 
 ## [v21.0](https://github.com/PrincetonUniversity/athena/tree/v21.0) (2021-01-06)
 
diff --git a/src/main.cpp b/src/main.cpp
index 3a72d4ce68..897de78c04 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -63,7 +63,7 @@
 //! \brief Athena++ main program
 
 int main(int argc, char *argv[]) {
-  std::string athena_version = "version 21.0 - January 2021";
+  std::string athena_version = "version 24.0 - June 2024";
   char *input_filename = nullptr, *restart_filename = nullptr;
   char *prundir = nullptr;
   int res_flag = 0;   // set to 1 if -r        argument is on cmdline