chore: Update versions on `main` (#379)
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a330f4..624a104 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -135,3 +135,49 @@
- **r**: Use `basic_array_stream()` to improve array stream to data.frame conversion (#279)
- **python**: Cleaner strategy for `__iter__()` on an `ArrowArrayStream` (#263)
+
+## nanoarrow 0.4.0
+
+### Docs
+
+- **r**: fix source links from pkgdown site (#315)
+
+### Feat
+
+- Check flags field of ArrowSchema on ArrowSchemaViewInit (#368)
+- Add decimal support to integration tester (#361)
+- Add support for datetime types in integration tester (#356)
+- Add dictionary support in integration test utility (#342)
+- Add C Data integration test shared library (#337)
+- Add Array/Schema/ArrayStream comparison utility to testing helpers (#330)
+- Add batch reader and data file read/write to/from ArrowArrayStream (#328)
+- Add integration testing reader for Column (#325)
+- Add integration testing JSON reader (#322)
+- Add Type/Field/Schema JSON writer for integration testing JSON (#321)
+- **extensions/nanoarrow_testing**: Add nanoarrow_testing extension with testing JSON writer (#317)
+- **python**: Implement user-facing Schema class (#366)
+- **python**: basic export through PyCapsules (#320)
+- **python**: Add ArrowDeviceArray extension to Python bindings (#313)
+- **python**: Support the PyCapsule protocol (#318)
+- **r**: Provide LinkingTo headers for extension packages (#332)
+- **r**: Add more `nanoarrow_array_stream` generics (#349)
+- **r**: Add conversion from integer type to `character()` (#345)
+
+### Fix
+
+- Issue with appending NULLs to IntervalArray (#376)
+- Suppress unused parameter warnings (#365)
+- Add `const` qualifier where appropriate in struct fields and declarations (#327)
+- **docs**: Correct typo in testing.rst (#348)
+- **r**: Ensure simple `list()`s can be converted without arrow installed (#344)
+- **r**: Ensure wrapper array stream eagerly releases the wrapped array stream (#333)
+
+### Perf
+
+- Improved Bit (Un)packing Performance (#280)
+
+### Refactor
+
+- Add wrappers around callbacks to improve syntax and debuggability (#338)
+- Improve syntax for implementing `ArrowArrayStream` from C++ (#336)
+- **python**: Document, prefix, and add reprs for C-wrapping classes (#340)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index fbcbe70..ff8cfd3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,7 +22,7 @@
set(CMAKE_C_STANDARD 99)
endif()
-set(NANOARROW_VERSION "0.4.0-SNAPSHOT")
+set(NANOARROW_VERSION "0.5.0-SNAPSHOT")
string(REGEX MATCH "^[0-9]+\\.[0-9]+\\.[0-9]+" NANOARROW_BASE_VERSION
"${NANOARROW_VERSION}")
project(nanoarrow VERSION "${NANOARROW_BASE_VERSION}")
diff --git a/python/src/nanoarrow/_static_version.py b/python/src/nanoarrow/_static_version.py
index 33ecbc5..2cad1cc 100644
--- a/python/src/nanoarrow/_static_version.py
+++ b/python/src/nanoarrow/_static_version.py
@@ -18,7 +18,7 @@
# This file is part of 'miniver': https://github.com/jbweston/miniver
# Replaced by version-bumping scripts at release time
-version = "0.4.0.dev0"
+version = "0.5.0.dev0"
# These values are only set if the distribution was created with 'git archive'
refnames = "$Format:%D$"
diff --git a/r/DESCRIPTION b/r/DESCRIPTION
index d8bd084..51a5c93 100644
--- a/r/DESCRIPTION
+++ b/r/DESCRIPTION
@@ -1,6 +1,6 @@
Package: nanoarrow
Title: Interface to the 'nanoarrow' 'C' Library
-Version: 0.3.0.9000
+Version: 0.4.0.9000
Authors@R: c(
person(given = "Dewey",
family = "Dunnington",
