diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c4021574..1e3d82222 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,11 @@ Changes are grouped as follows
 - `Fixed` for any bug fixes.
 - `Security` in case of vulnerabilities.
 
+## [0.33.1] - 2023-08-03
+
+### Changed
+* ResyncConfig.cogshop to have time_series_mappings as optional.
+
 ## [0.33.0] - 2023-07-26
 
 ### Removed
diff --git a/cognite/powerops/_version.py b/cognite/powerops/_version.py
index 571d8ccaa..49f85f29f 100644
--- a/cognite/powerops/_version.py
+++ b/cognite/powerops/_version.py
@@ -1 +1 @@
-__version__ = "0.33.0"
+__version__ = "0.33.1"
diff --git a/cognite/powerops/resync/config/resync_config.py b/cognite/powerops/resync/config/resync_config.py
index c16a1256c..d10daa80e 100644
--- a/cognite/powerops/resync/config/resync_config.py
+++ b/cognite/powerops/resync/config/resync_config.py
@@ -142,7 +142,7 @@ def load_yamls(cls, config_dir_path: Path, instantiate: bool = False) -> dict[st
 
 
 class CogShopConfig(Config):
-    time_series_mappings: list[TimeSeriesMapping]
+    time_series_mappings: Optional[list[TimeSeriesMapping]] = None
     watercourses_shop: list[ShopFileConfig]
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 3bac5cf62..a1fb5f2d3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "cognite-power-ops"
-version = "0.33.0"
+version = "0.33.1"
 description = "SDK for power markets operations on Cognite Data Fusion"
 readme = "README.md"
 authors = ["Cognite <support@cognite.com>"]