diff --git a/sci-log-db/src/__tests__/acceptance/paragraph.controller.acceptance.ts b/sci-log-db/src/__tests__/acceptance/paragraph.controller.acceptance.ts
index c66c202a..57345f04 100644
--- a/sci-log-db/src/__tests__/acceptance/paragraph.controller.acceptance.ts
+++ b/sci-log-db/src/__tests__/acceptance/paragraph.controller.acceptance.ts
@@ -227,6 +227,31 @@ describe('Paragraph', function (this: Suite) {
       });
   });
 
+  it('posts a comment with tags and should update the parent', async () => {
+    await client
+      .post('/paragraphs')
+      .set('Authorization', 'Bearer ' + token)
+      .set('Content-Type', 'application/json')
+      .send({
+        ...paragraphSnippet,
+        tags: ['another'],
+        linkType: 'comment',
+        parentId: paragraphSnippetId,
+      })
+      .expect(200);
+    await client
+      .get(`/paragraphs/${paragraphSnippetId}`)
+      .set('Authorization', 'Bearer ' + token)
+      .set('Content-Type', 'application/json')
+      .expect(200)
+      .then(result =>
+        expect(result.body.tags).to.eql(['aSearchExcludedTag', 'another']),
+      )
+      .catch(err => {
+        throw err;
+      });
+  });
+
   it('delete snippet by id without token should return 401', async () => {
     await client
       .delete(`/paragraphs/${paragraphSnippetId}`)
diff --git a/sci-log-db/src/mixins/basesnippet.repository-mixin.ts b/sci-log-db/src/mixins/basesnippet.repository-mixin.ts
index dac2b36d..06bbd417 100644
--- a/sci-log-db/src/mixins/basesnippet.repository-mixin.ts
+++ b/sci-log-db/src/mixins/basesnippet.repository-mixin.ts
@@ -27,8 +27,9 @@ import {AutoAddRepository} from '../repositories/autoadd.repository.base';
 const fs = require('fs');
 
 type ExpandedBasesnippet = Basesnippet & {
-  ownerGroup: string;
-  accessGroups: string[];
+  ownerGroup?: string;
+  accessGroups?: string[];
+  tags?: string[];
 };
 
 function UpdateAndDeleteRepositoryMixin<
@@ -252,6 +253,20 @@ function UpdateAndDeleteRepositoryMixin<
         });
       }
     }
+
+    private async updateParentTagsOnComment(basesnippet: Paragraph) {
+      if (basesnippet.linkType !== 'comment') return;
+      const self = this as unknown as AutoAddRepository<M, ID, Relations>;
+      const parent = (await self.getParent(basesnippet)) as Paragraph;
+      const tags = arrayOfUniqueFrom(parent.tags, basesnippet.tags);
+      if (!_.isEqual(tags, parent.tags))
+        await this.updateByIdWithHistory(
+          parent.id as ID,
+          {tags: tags} as ExpandedBasesnippet,
+          {currentUser: {roles: ['admin']}},
+          false,
+        );
+    }
   }
   return Mixed;
 }
diff --git a/sci-log-db/src/repositories/autoadd.repository.base.ts b/sci-log-db/src/repositories/autoadd.repository.base.ts
index 3504403b..d1365786 100644
--- a/sci-log-db/src/repositories/autoadd.repository.base.ts
+++ b/sci-log-db/src/repositories/autoadd.repository.base.ts
@@ -132,7 +132,7 @@ export class AutoAddRepository<
     );
   }
 
-  private async getParent(
+  async getParent(
     data: (Basesnippet | Logbook) & {
       ownerGroup?: string | undefined;
       accessGroups?: string[];
@@ -357,6 +357,10 @@ export class AutoAddRepository<
           // ctx.instance.unsetAttribute('id')
         }
       }
+      const baseSnippetRepository = await this.baseSnippetRepository();
+      await baseSnippetRepository.updateParentTagsOnComment(
+        ctx.data ?? ctx.instance,
+      );
       sanitizeTextContentInPlace(ctx.data ?? ctx.instance);
       console.log('going to save:' + JSON.stringify(ctx, null, 3));
     });