diff --git a/CHANGELOG.md b/CHANGELOG.md
index 354263a14..bc4997a6c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,66 @@
 # Changelog
 
+## 4.0.0-rc.28
+
+### Breaking Changes
+
+- The `QuantumComputer`'s `run` method now takes an optional `MemoryMap` parameter. This mapping takes memory region names to a list of values to use for a run. This replaces the need to use `write_memory` on `Program`s between runs.
+- use qcs-sdk-python implementation of conjugate_pauli_by_clifford and generate_randomized_benchmarking_sequence (#1557)
+- remove qcs-api-client dependency (#1550)
+- Removes the compatilbility.v2 subpackage
+
+### Features
+
+- increase gRPC message size limit (#1610)
+- support translation options for QPUCompiler (#1590)
+- remove v2 compatibility layer (#1475)
+- gracefully handle error when QPU unavailable for engagement (#1457)
+
+### Fixes
+
+- `Program.copy_everything_except_instructions()` no longer adds declarations to the instructions property (#1612)
+- specify `quil` as a dependency
+- `copy_everything_but_instructions` now correctly copies `DECLARE` statements (#1600)
+- get_qc will use the given client_configuration
+- Remove calibrations from program before sending them to a QVM (#1592)
+- Replace `retry`, loosen `networkx` requirements, ensure adding programs don't mutate the first
+- Parametric DefGates and upper case function call expressions will no longer fail to parse. (#1589)
+- native_quil_to_executable will no longer block indefinitely (#1585)
+- The default QCSClient will now load without having QCS credentials (#1582)
+- bump qcs-sdk-python to fix waveforms (#1507)
+- Remove pyi type annotations causing runtime errors (#1506)
+- use highest priority Gateway (#1504)
+- use properly packaged qcs-sdk types
+- Docs Theme
+- Docker qvm/quilc in `rigetti/forest` image. (#1437)
+- DefFrame to/from Quil with JSON values (#1419)
+- DefFrame to/from Quil with JSON values (#1419)
+- Correctly apply the phase in quilwaveforms (#1408)
+- allow spaces in DEFFRAME specs
+- Correctly apply the phase in quilwaveforms (#1408)
+- Changed pad_left to pad_right
+- allow spaces in DEFFRAME specs
+- Changed pad_left to pad_right
+- update Quil-T docs to use `get_calibration_program()` name (#1389)
+- allow np.ndarray in write_memory and disallow non-int and non-fl… (#1365)
+- document error on noisy qcs qpu request
+- Fix bug in QPU workflow
+- Fix execution of parametric programs (#1353)
+- sphinx>=3.0.0,<4.0.0
+- support instructions with no qubits or parameters
+- remove extraneous debug prints
+- Remove test RPCQ server to improve CI consistency. (#1350)
+- lock port test fixture
+- provide default client configuration on get qcs qpu (#1333)
+- raise error on noisy qcs qpu (#1332)
+- ignore node modules and commit npm lock
+- Fix contiguous engagement handling (#1325)
+- Re-add `QPUCompiler.refresh_calibration_program()` (#1323)
+- add git commit messge check (#1318)
+- include dead attributes when no gates present (#1317)
+- Fix RC publising to PyPI
+- GitHub checks for PRs to rc branch
+
 ## 4.0.0-rc.27
 
 ### Breaking Changes
diff --git a/pyproject.toml b/pyproject.toml
index 86817ceab..bf08dea0f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pyquil"
-version = "4.0.0-rc.27"
+version = "4.0.0-rc.28"
 description = "A Python library for creating Quantum Instruction Language (Quil) programs."
 authors = ["Rigetti Computing <softapps@rigetti.com>"]
 readme = "README.md"