diff --git a/.cz.toml b/.cz.toml
index 352869b..bfa7bd5 100644
--- a/.cz.toml
+++ b/.cz.toml
@@ -3,7 +3,7 @@ gpg_sign = true
 name = "cz_conventional_commits"
 tag_format = "v$version"
 version_scheme = "pep440"
-version = "8.1.45"
+version = "8.1.45.post1"
 update_changelog_on_bump = true
 version_files = [
     "src/system/__version__.py:__version__"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 592ff56..8244c2f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## v8.1.45.post1 (2025-01-13)
+
+### Refactor
+
+- **ia**: add propertyArrayIndices argument to readRawMultiple (#309)
+
 ## v8.1.45 (2025-01-08)
 
 ## v8.1.44.post1 (2024-11-06)
diff --git a/src/system/__version__.py b/src/system/__version__.py
index 7a21d2a..16af62a 100644
--- a/src/system/__version__.py
+++ b/src/system/__version__.py
@@ -1,4 +1,4 @@
 """Package information."""
 
-__version__ = "8.1.45"
+__version__ = "8.1.45.post1"
 __build__ = "2024082010"