diff --git a/reqbaz/src/main/java/de/rwth/dbis/acis/bazaar/service/dal/DALFacade.java b/reqbaz/src/main/java/de/rwth/dbis/acis/bazaar/service/dal/DALFacade.java
index f81be4e..279d31d 100644
--- a/reqbaz/src/main/java/de/rwth/dbis/acis/bazaar/service/dal/DALFacade.java
+++ b/reqbaz/src/main/java/de/rwth/dbis/acis/bazaar/service/dal/DALFacade.java
@@ -830,6 +830,20 @@ public interface DALFacade {
      * @throws Exception
      */
     void untagRequirement(int tagId, int requirementId) throws Exception;
+
+    /**
+     * Updates a Tag
+     *
+     * @param tag comment to persist
+     * @return the updated comment
+     * @throws Exception
+     */
+    Tag updateTag(Tag tag) throws Exception;
+
+    /**
+     * @param tagId to identify the comment to be deleted
+     */
+    Tag deleteTagById(int tagId) throws Exception;
     // endregion tags
 
 
diff --git a/reqbaz/src/main/java/de/rwth/dbis/acis/bazaar/service/dal/DALFacadeImpl.java b/reqbaz/src/main/java/de/rwth/dbis/acis/bazaar/service/dal/DALFacadeImpl.java
index e00a3e3..5ecf6c9 100644
--- a/reqbaz/src/main/java/de/rwth/dbis/acis/bazaar/service/dal/DALFacadeImpl.java
+++ b/reqbaz/src/main/java/de/rwth/dbis/acis/bazaar/service/dal/DALFacadeImpl.java
@@ -974,6 +974,21 @@ public void untagRequirement(int tagId, int requirementId) throws Exception {
         requirementTagRepository.delete(tagId, requirementId);
     }
 
+    @Override
+    public Tag updateTag(Tag tag) throws Exception {
+        tagRepository = (tagRepository != null) ? tagRepository : new TagRepositoryImpl(dslContext);
+        tagRepository.update(tag);
+        return tagRepository.findById(tag.getId());
+    }
+
+    @Override
+    public Tag deleteTagById(int tagId) throws Exception {
+        tagRepository = (tagRepository != null) ? tagRepository : new TagRepositoryImpl(dslContext);
+        Tag tag = tagRepository.findById(tagId);
+        tagRepository.delete(tagId);
+        return tag;
+    }
+
     @Override
     public PaginationResult<ProjectMember> getProjectMembers(int projectId, Pageable pageable) throws
             BazaarException {
diff --git a/reqbaz/src/main/java/de/rwth/dbis/acis/bazaar/service/resources/ProjectsResource.java b/reqbaz/src/main/java/de/rwth/dbis/acis/bazaar/service/resources/ProjectsResource.java
index d8e8575..586de2a 100644
--- a/reqbaz/src/main/java/de/rwth/dbis/acis/bazaar/service/resources/ProjectsResource.java
+++ b/reqbaz/src/main/java/de/rwth/dbis/acis/bazaar/service/resources/ProjectsResource.java
@@ -711,6 +711,78 @@ public Response createTag(@PathParam("projectId") int projectId,
         }
     }
 
+    /**
+     * Allows to update a tag of a project.
+     *
+     * @param projectId id of the project to update
+     * @param tag       One modified project tag
+     * @return Response with empty body.
+     */
+    @PUT
+    @Path("/{projectId}/tags")
+    @Consumes(MediaType.APPLICATION_JSON)
+    @Produces(MediaType.APPLICATION_JSON)
+    @ApiOperation(value = "This method allows to modify a project tag.")
+    @ApiResponses(value = {
+            @ApiResponse(code = HttpURLConnection.HTTP_NO_CONTENT, message = "Member modified"),
+            @ApiResponse(code = HttpURLConnection.HTTP_UNAUTHORIZED, message = "Unauthorized"),
+            @ApiResponse(code = HttpURLConnection.HTTP_NOT_FOUND, message = "Not found"),
+            @ApiResponse(code = HttpURLConnection.HTTP_INTERNAL_ERROR, message = "Internal server problems")
+    })
+    public Response updateTags(@PathParam("projectId") int projectId,
+                               @ApiParam(value = "New or updated tags", required = true) Tag tag) {
+        DALFacade dalFacade = null;
+        try {
+            String userId = resourceHelper.getUserId();
+            resourceHelper.handleGenericError(bazaarService.validate(tag));
+
+            dalFacade = bazaarService.getDBConnection();
+            Integer internalUserId = dalFacade.getUserIdByLAS2PeerId(userId);
+
+            // ensure the given tag exists
+            dalFacade.getTagById(tag.getId());
+            dalFacade.updateTag(tag);
+            bazaarService.getNotificationDispatcher().dispatchNotification(OffsetDateTime.now(), Activity.ActivityAction.UPDATE, MonitoringEvent.SERVICE_CUSTOM_MESSAGE_6, projectId, Activity.DataType.PROJECT, internalUserId);
+            return Response.noContent().build();
+        } catch (BazaarException bex) {
+            return resourceHelper.handleBazaarException(bex, "Update tag", logger);
+        } catch (Exception ex) {
+            return resourceHelper.handleException(ex, "Update tag", logger);
+        } finally {
+            bazaarService.closeDBConnection(dalFacade);
+        }
+    }
+
+    @DELETE
+    @Path("/{projectId}/tags/{tagId}")
+    @Produces(MediaType.APPLICATION_JSON)
+    @ApiOperation(value = "This method allows to remove a tag.")
+    @ApiResponses(value = {
+            @ApiResponse(code = HttpURLConnection.HTTP_NO_CONTENT, message = "Tag removed"),
+            @ApiResponse(code = HttpURLConnection.HTTP_UNAUTHORIZED, message = "Unauthorized"),
+            @ApiResponse(code = HttpURLConnection.HTTP_NOT_FOUND, message = "Not found"),
+            @ApiResponse(code = HttpURLConnection.HTTP_INTERNAL_ERROR, message = "Internal server problems")
+    })
+    public Response removeTag(
+            @ApiParam(value = "Project to remove the tag from") @PathParam("projectId") int projectId,
+            @ApiParam(value = "Tag ID of the Tag to remove") @PathParam("tagId") int tagId) {
+        DALFacade dalFacade = null;
+        try {
+            String userId = resourceHelper.getUserId();
+            dalFacade = bazaarService.getDBConnection();
+            Integer internalUserId = dalFacade.getUserIdByLAS2PeerId(userId);
+            dalFacade.deleteTagById(tagId);
+            bazaarService.getNotificationDispatcher().dispatchNotification(OffsetDateTime.now(), Activity.ActivityAction.UPDATE, MonitoringEvent.SERVICE_CUSTOM_MESSAGE_6, projectId, Activity.DataType.PROJECT, internalUserId);
+            return Response.noContent().build();
+        } catch (BazaarException bex) {
+            return resourceHelper.handleBazaarException(bex, "Remove tag", logger);
+        } catch (Exception ex) {
+            return resourceHelper.handleException(ex, "Remove tag", logger);
+        } finally {
+            bazaarService.closeDBConnection(dalFacade);
+        }
+    }
+
     /**
      * Add a member to the project
      *