diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5688aa04..d633a596 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 - `cdn`: [v1.2.0](services/cdn/CHANGELOG.md#v120)
   - **Feature:** Add `default_cache_duration` attribute to `Config`, `ConfigPatch` and `CreateDistributionPayload` model
   - Add `originUrlRelated` to available options given in `sort_by` description
+- `stackitmarketplace`: [v1.4.0](services/stackitmarketplace/CHANGELOG.md#v140)
+  - **Feature:** Add support for offer types
+    - new model `OfferType`
+    - new attribute `CatalogProductDetail` for `CatalogProductDetail` model
+  - Attribute `is_product_listing` in `CatalogProductDetail` is now of type `Optional[StrictBool]` (previously `StrictBool`)
 
 ## Release (2025-06-16)
 - `core`: [v0.2.0](core/CHANGELOG.md#v020-2025-06-12)
diff --git a/services/stackitmarketplace/CHANGELOG.md b/services/stackitmarketplace/CHANGELOG.md
index d6060db7..89a61c55 100644
--- a/services/stackitmarketplace/CHANGELOG.md
+++ b/services/stackitmarketplace/CHANGELOG.md
@@ -1,3 +1,9 @@
+## v1.4.0 
+- **Feature:** Add support for offer types
+    - new model `OfferType`
+    - new attribute `CatalogProductDetail` for `CatalogProductDetail` model
+- Attribute `is_product_listing` in `CatalogProductDetail` is now of type `Optional[StrictBool]` (previously `StrictBool`)
+
 ## v1.3.0 (2025-06-10)
 - **Feature:** Add new field `facets` in `ListCatalogProductsResponse`
 
diff --git a/services/stackitmarketplace/pyproject.toml b/services/stackitmarketplace/pyproject.toml
index 2e0baa11..83f282e7 100644
--- a/services/stackitmarketplace/pyproject.toml
+++ b/services/stackitmarketplace/pyproject.toml
@@ -3,7 +3,7 @@ name = "stackit-stackitmarketplace"
 
 [tool.poetry]
 name = "stackit-stackitmarketplace"
-version = "v1.3.0"
+version = "v1.4.0"
 authors = [
     "STACKIT Developer Tools <developer-tools@stackit.cloud>",
 ]
@@ -105,4 +105,4 @@ per-file-ignores = """
     # E501: long descriptions/string values might lead to lines that are too long
     # B028: stacklevel for deprecation warning is irrelevant
   ./src/stackit/*/api/default_api.py: F841,B028,E501
-"""
\ No newline at end of file
+"""