diff --git a/CHANGELOG.md b/CHANGELOG.md
index 91f48b608..12f30f0fe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,14 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 <!-- These are the changes that were not release yet, please add them correctly.
 Attention: The newest changes should be on top -->
 
+## [1.3.0.post1] - 2024-06-02
+
+You can install this version by running `pip install rocketpy==1.3.0.post1`
+
+### Fixed
+
+- BUG: pyproject.toml Main Module Finding. [#616](https://github.com/RocketPy-Team/RocketPy/pull/616)
+
 ## [1.3.0] - 2024-06-01
 
 You can install this version by running `pip install rocketpy==1.3.0`
@@ -62,6 +70,7 @@ You can install this version by running `pip install rocketpy==1.3.0`
 
 ### Fixed
 
+- MNT: Alter PYPI classifier naming. [#615](https://github.com/RocketPy-Team/RocketPy/pull/615)
 - DOC: Solve Dependencies Conflicts and pyproject build [#613](https://github.com/RocketPy-Team/RocketPy/pull/613)
 - BUG: Fixes nose cone bluffness issue #610 [#611](https://github.com/RocketPy-Team/RocketPy/pull/611)
 - BUG: plot drag curves when function source is callable [#599](https://github.com/RocketPy-Team/RocketPy/pull/599)
diff --git a/pyproject.toml b/pyproject.toml
index 2e3971b75..7c824e466 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,6 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "License :: OSI Approved :: MIT License",
     "Operating System :: OS Independent",
-    "Topic :: Rocket Flight Simulation :: Libraries :: Python Modules",
 ]
 
 [project.urls]
@@ -21,11 +20,11 @@ documentation = "https://docs.rocketpy.org/"
 repository = "https://github.com/RocketPy-Team/RocketPy"
 
 [build-system]
-requires = ["setuptools"]
+requires = ["setuptools>=42", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools]
-py-modules = ['rocketpy']
+packages = { find = { where = ["."], include = ["rocketpy*"] } }
 
 [tool.setuptools.dynamic]
 dependencies = { file = ["requirements.txt"] }