diff --git a/backend/src/main/spoonaccular/AmountConversion.java b/backend/src/main/spoonaccular/AmountConversion.java
index ae2593a..64ed9c8 100644
--- a/backend/src/main/spoonaccular/AmountConversion.java
+++ b/backend/src/main/spoonaccular/AmountConversion.java
@@ -21,14 +21,19 @@ public class AmountConversion {
         Request request = APIAuthentication.addAuthHeaders(
                 new Request.Builder()
                         .url("https://" + dotenv.get("X-RapidAPI-Host") +
-                        "recipes/convert?ingredientName=" + ingrdientName +
+                        "/recipes/convert?ingredientName=" + ingrdientName +
                         "&targetUnit=" + targetUnit +
                         "&sourceUnit=" + sourceUnit +
                         "&sourceAmount=" + sourceAmount)
         ).build();
         Response response = client.newCall(request).execute();
         String responseString = response.body().string();
-        return new ObjectMapper().readValue(responseString, ConvertedAmount.class).getTargetAmount();
+        try {
+            return new ObjectMapper().readValue(responseString, ConvertedAmount.class).getTargetAmount();
+        } catch (Exception e){
+            return 0;
+        }
+
     }
 
 }
diff --git a/backend/src/main/whattocook/controller/IngredientController.java b/backend/src/main/whattocook/controller/IngredientController.java
index 9a5a0f6..32d033e 100644
--- a/backend/src/main/whattocook/controller/IngredientController.java
+++ b/backend/src/main/whattocook/controller/IngredientController.java
@@ -13,6 +13,7 @@ import whattocook.models.Item;
 import whattocook.services.ItemService;
 
 import java.io.IOException;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Optional;
 
@@ -24,10 +25,11 @@ public class IngredientController {
     ItemService itemService;
 
     @DeleteMapping("/ingredient/removeRecipeIngredients")
-    public void removeRecipeIngredients(@RequestParam int id) throws IOException, JSONException {
+    public List<Item> removeRecipeIngredients(@RequestParam int id) throws IOException, JSONException {
         List<Ingredient> ingredientList = RecipeInformation.getIngredientList(id);
+        List<Item> changedItemList = new LinkedList<>();
         for (Ingredient ingredient : ingredientList){
-            Optional<Item> possibleItem = itemService.findByName(ingredient.getName());
+            Optional<Item> possibleItem = itemService.findByNameIgnoreCaseContaining(ingredient.getName());
             if (possibleItem.isPresent()){
                 Item item = possibleItem.get();
                 double newItemQuantity;
@@ -42,12 +44,15 @@ public class IngredientController {
                     newItemQuantity = item.getQuantity() - ingridientAmount;
                 }
                 if (newItemQuantity > 0){
-                    item.setQuantity(newItemQuantity);
+                    item.setQuantity(newItemQuantity);  
+                    itemService.save(item);
                 } else {
                     itemService.deleteById(item.getId());
                 }
+                changedItemList.add(item);
             }
         }
+        return changedItemList;
     }
 
 
diff --git a/backend/src/main/whattocook/implementation/ItemServiceImpl.java b/backend/src/main/whattocook/implementation/ItemServiceImpl.java
index 5b174b7..b9d364c 100644
--- a/backend/src/main/whattocook/implementation/ItemServiceImpl.java
+++ b/backend/src/main/whattocook/implementation/ItemServiceImpl.java
@@ -34,6 +34,11 @@ public class ItemServiceImpl implements ItemService {
         return itemRepository.findByName(name);
     }
 
+    @Override
+    public Optional<Item> findByNameIgnoreCaseContaining(String name) {
+        return itemRepository.findByNameIgnoreCaseContaining(name);
+    }
+
     @Override
     public Iterable<Item> findAll() {
         return itemRepository.findAll();
diff --git a/backend/src/main/whattocook/models/Unit.java b/backend/src/main/whattocook/models/Unit.java
index ed37377..debc25c 100644
--- a/backend/src/main/whattocook/models/Unit.java
+++ b/backend/src/main/whattocook/models/Unit.java
@@ -1,6 +1,6 @@
 package whattocook.models;
 
 public enum Unit {
-    GRAMMS,
-    MILLILETERS
+    g,
+    ml
 }
diff --git a/backend/src/main/whattocook/repositories/ItemRepository.java b/backend/src/main/whattocook/repositories/ItemRepository.java
index d9caa8a..2bb11fc 100644
--- a/backend/src/main/whattocook/repositories/ItemRepository.java
+++ b/backend/src/main/whattocook/repositories/ItemRepository.java
@@ -9,4 +9,5 @@ import java.util.Optional;
 @Repository
 public interface ItemRepository extends CrudRepository<Item, Long> {
     Optional<Item> findByName(String name);
+    Optional<Item> findByNameIgnoreCaseContaining(String name);
 }
diff --git a/backend/src/main/whattocook/services/ItemService.java b/backend/src/main/whattocook/services/ItemService.java
index 5db566f..b1a5cbf 100644
--- a/backend/src/main/whattocook/services/ItemService.java
+++ b/backend/src/main/whattocook/services/ItemService.java
@@ -9,5 +9,6 @@ public interface ItemService {
     void deleteById(Long id);
     Optional<Item> findById(long id);
     Optional<Item> findByName(String name);
+    Optional<Item> findByNameIgnoreCaseContaining(String name);
     Iterable<Item> findAll();
 }
diff --git a/backend/src/test/java/items/ItemTests.java b/backend/src/test/java/items/ItemTests.java
index ff27ce7..af91a6f 100644
--- a/backend/src/test/java/items/ItemTests.java
+++ b/backend/src/test/java/items/ItemTests.java
@@ -29,14 +29,14 @@ final class ItemTests {
 
     @Test
     public void saveTest() {
-        Item item = new Item("kartoffel", Unit.GRAMMS, 5000);
+        Item item = new Item("kartoffel", Unit.g, 5000);
         itemRepository.save(item);
         assertTrue(itemRepository.existsById(item.getId()));
     }
 
     @Test
     public void findByIDTest() {
-        Item item = new Item("tortillias", Unit.GRAMMS, 5000);
+        Item item = new Item("tortillias", Unit.g, 5000);
         itemRepository.save(item);
         assertEquals(item, itemRepository.findById(item.getId()).get());
     }
@@ -49,7 +49,7 @@ final class ItemTests {
 
     @Test
     public void findByNameTest(){
-        Item item = new Item("tortillias", Unit.GRAMMS, 5000);
+        Item item = new Item("tortillias", Unit.g, 5000);
         itemRepository.save(item);
         assertEquals(item, itemRepository.findByName(item.getName()).get());
     }
@@ -57,11 +57,11 @@ final class ItemTests {
     @Test
     public void findAllTest() {
         List<Item> savedItems = new ArrayList();
-        savedItems.add( new Item("nachos", Unit.GRAMMS, 5000));
-        savedItems.add( new Item("wurst", Unit.GRAMMS, 5000));
-        savedItems.add( new Item("schinken", Unit.GRAMMS, 5000));
-        savedItems.add( new Item("brokkoli", Unit.GRAMMS, 5000));
-        savedItems.add( new Item("eiscreme", Unit.GRAMMS, 5000));
+        savedItems.add( new Item("nachos", Unit.g, 5000));
+        savedItems.add( new Item("wurst", Unit.g, 5000));
+        savedItems.add( new Item("schinken", Unit.g, 5000));
+        savedItems.add( new Item("brokkoli", Unit.g, 5000));
+        savedItems.add( new Item("eiscreme", Unit.g, 5000));
 
         itemRepository.saveAll(savedItems);
 
@@ -71,7 +71,7 @@ final class ItemTests {
 
     @Test
     public void deleteTest() {
-        Item item = new Item("elefantenfuß", Unit.GRAMMS, 5000);
+        Item item = new Item("elefantenfuß", Unit.g, 5000);
         itemRepository.save(item);
         assertEquals(item, itemRepository.findById(item.getId()).get());
         itemRepository.delete(item);
@@ -80,7 +80,7 @@ final class ItemTests {
 
     @Test
     public void updateTest() {
-        Item item = new Item("schokoküsse", Unit.GRAMMS, 5000);
+        Item item = new Item("schokoküsse", Unit.g, 5000);
         itemRepository.save(item);
         long itemCount = itemRepository.count();
         item.setQuantity(4574);
diff --git a/build.gradle b/build.gradle
index 57002e6..7409ee6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '2.6.7'
+    id 'org.springframework.boot' version '2.7.1'
     id 'io.spring.dependency-management' version '1.0.11.RELEASE'
     id 'java'
 }