diff --git a/.changeset/fair-turtles-end.md b/.changeset/fair-turtles-end.md
new file mode 100644
index 0000000000..2b4a067deb
--- /dev/null
+++ b/.changeset/fair-turtles-end.md
@@ -0,0 +1,5 @@
+---
+"@medusajs/product": patch
+---
+
+fix(product): Return updated collections
diff --git a/packages/modules/product/integration-tests/__tests__/product-module-service/product-collections.spec.ts b/packages/modules/product/integration-tests/__tests__/product-module-service/product-collections.spec.ts
index 666be95310..b27fa6adf4 100644
--- a/packages/modules/product/integration-tests/__tests__/product-module-service/product-collections.spec.ts
+++ b/packages/modules/product/integration-tests/__tests__/product-module-service/product-collections.spec.ts
@@ -384,6 +384,22 @@ moduleIntegrationTestRunner<IProductModuleService>({
           )
         })
 
+        it("should respond with collections when products are updated", async () => {
+          const collections = await service.updateProductCollections(
+            collectionId,
+            {
+              title: "Updated Collection",
+            }
+          )
+
+          expect(collections).toEqual(
+            expect.objectContaining({
+              id: collectionId,
+              title: "Updated Collection",
+            })
+          )
+        })
+
         it("should throw an error when an id does not exist", async () => {
           let error
 
diff --git a/packages/modules/product/src/services/product-module-service.ts b/packages/modules/product/src/services/product-module-service.ts
index 036ebf3849..cbf36f4706 100644
--- a/packages/modules/product/src/services/product-module-service.ts
+++ b/packages/modules/product/src/services/product-module-service.ts
@@ -1188,55 +1188,53 @@ export default class ProductModuleService
     )
 
     const collections: InferEntityType<typeof ProductCollection>[] = []
+    const toUpdate: {
+      selector: ProductTypes.FilterableProductProps
+      data: ProductTypes.UpdateProductDTO
+    }[] = []
 
-    const updateSelectorAndData = updatedCollections.flatMap(
-      (collectionData) => {
-        const input = normalizedInput.find((c) => c.id === collectionData.id)
-        const productsToUpdate = (input as any)?.products
+    updatedCollections.forEach((collectionData) => {
+      const input = normalizedInput.find((c) => c.id === collectionData.id)
+      const productsToUpdate = (input as any)?.products
 
-        const dissociateSelector = {
-          collection_id: collectionData.id,
-        }
-        const associateSelector = {}
-
-        if (!!productsToUpdate?.length) {
-          const productIds = productsToUpdate.map((p) => p.id)
-
-          dissociateSelector["id"] = { $nin: productIds }
-          associateSelector["id"] = { $in: productIds }
-        } else if (!isDefined(productsToUpdate)) {
-          return []
-        }
-
-        const result: Record<string, any>[] = [
-          {
-            selector: dissociateSelector,
-            data: {
-              collection_id: null,
-            },
-          },
-        ]
-
-        if (isPresent(associateSelector)) {
-          result.push({
-            selector: associateSelector,
-            data: {
-              collection_id: collectionData.id,
-            },
-          })
-        }
-
-        collections.push({
-          ...collectionData,
-          products: productsToUpdate ?? [],
-        } as InferEntityType<typeof ProductCollection>)
-
-        return result
+      const dissociateSelector = {
+        collection_id: collectionData.id,
       }
-    )
+      const associateSelector = {}
 
-    if (updateSelectorAndData.length) {
-      await this.productService_.update(updateSelectorAndData, sharedContext)
+      if (isDefined(productsToUpdate)) {
+        const productIds = productsToUpdate.map((p) => p.id)
+
+        dissociateSelector["id"] = { $nin: productIds }
+        associateSelector["id"] = { $in: productIds }
+      }
+
+      if (isPresent(dissociateSelector["id"])) {
+        toUpdate.push({
+          selector: dissociateSelector,
+          data: {
+            collection_id: null,
+          },
+        })
+      }
+
+      if (isPresent(associateSelector["id"])) {
+        toUpdate.push({
+          selector: associateSelector,
+          data: {
+            collection_id: collectionData.id,
+          },
+        })
+      }
+
+      collections.push({
+        ...collectionData,
+        products: productsToUpdate ?? [],
+      } as InferEntityType<typeof ProductCollection>)
+    })
+
+    if (toUpdate.length) {
+      await this.productService_.update(toUpdate, sharedContext)
     }
 
     return collections