diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7cb3f01..4a8b522 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 1.6.0 (2023-03-15)
+
+### Perf
+
+- **models**: optimize `Measurement`
+
 ## 1.5.0 (2023-03-12)
 
 ### Feat
diff --git a/peprock/_version/__init__.py b/peprock/_version/__init__.py
index 6934fce..465e3fe 100644
--- a/peprock/_version/__init__.py
+++ b/peprock/_version/__init__.py
@@ -1 +1 @@
-__version__: str = "1.5.0"
+__version__: str = "1.6.0"
diff --git a/pyproject.toml b/pyproject.toml
index 8ad6cf6..9b4129f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 bump_message = "chore: bump version to $new_version"
 changelog_incremental = true
 update_changelog_on_bump = true
-version = "1.5.0"
+version = "1.6.0"
 version_files = [
     "peprock/_version/__init__.py",
     "pyproject.toml",
@@ -37,7 +37,7 @@ warn_unreachable = true
 
 [tool.poetry]
 name = "peprock"
-version = "1.5.0"
+version = "1.6.0"
 description = "Foundational Python library"
 license = "MIT"
 authors = [