Release v1.5.3

PiperOrigin-RevId: 876382865

Author: riemanli

CHANGELOG.md

@@ -23,6 +23,13 @@ To release a new version (e.g. from `1.0.0` -> `2.0.0`):
 
 ## [Unreleased]
 
+## [1.5.3] - 2026-02-27
+
+* Refactor model fit plot to include interactive tooltips and hover effects
+* Fix import paths in Meridian Scenario Planner notebook.
+* Always proccess specs including full time range in MMM UI proto generator.
+* Update MarketingData serialization to support float population values.
+
 ## [1.5.2] - 2026-02-10
 
 * Move `schema` package as `meridian.schema`.
@@ -452,4 +459,5 @@ To release a new version (e.g. from `1.0.0` -> `2.0.0`):
 [1.5.0]: https://github.com/google/meridian/releases/tag/v1.5.0
 [1.5.1]: https://github.com/google/meridian/releases/tag/v1.5.1
 [1.5.2]: https://github.com/google/meridian/releases/tag/v1.5.2
-[Unreleased]: https://github.com/google/meridian/compare/v1.5.2...HEAD
+[1.5.3]: https://github.com/google/meridian/releases/tag/v1.5.3
+[Unreleased]: https://github.com/google/meridian/compare/v1.5.3...HEAD

README.md

@@ -153,7 +153,7 @@ To cite this repository:
   author = {Google Meridian Marketing Mix Modeling Team},
   title = {Meridian: Marketing Mix Modeling},
   url = {https://github.com/google/meridian},
-  version = {1.5.2},
-  year = {2025},
+  version = {1.5.3},
+  year = {2026},
 }
 ```

meridian/version.py

@@ -14,4 +14,4 @@
 
 """Module for Meridian version."""
 
-__version__ = "1.5.2"
+__version__ = "1.5.3"