diff --git a/CHANGELOG.md b/CHANGELOG.md
index de94f6f6..315579d5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,7 +12,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 -   Agents now follow a common configuration format, simplifying the configuration of agents and their extensibilty.
 -   Actions within PrimAITE are now extensible, allowing for plugin support.
-
+-   Added a config schema to `ObservationManager`, `ActionManager`, and `RewardFunction`.
+-   Streamlined the way agents are created from config
+-   Agent config no longer requires a dummy action space if the action space is empty, the same applies for observation space and reward function
+-   Actions now support a config schema, to allow yaml data validation and default parameter values
+-   Action parameters are no longer defined through IDs, instead meaningful data is provided directly in the action map
+-   Test and example YAMLs have been updated to match the new agent and action schemas, such as:
+    -   Removed empty action spaces, observation spaces, or reward spaces for agent which didn't use them
+    -   Relabeled action parameters to match the new action config schemas, and updated the values to no longer rely on indices
+    -   Removed action space options which were previously used for assigning meaning to action space IDs
+-   Updated tests that don't use YAMLs to still use the new action and agent schemas
 
 ## [3.3.0] - 2024-09-04