diff --git a/libs/redmine-issues-cache-writer/src/redmine-issues-cache-writer.module.ts b/libs/redmine-issues-cache-writer/src/redmine-issues-cache-writer.module.ts
index 3eb879c..9268694 100644
--- a/libs/redmine-issues-cache-writer/src/redmine-issues-cache-writer.module.ts
+++ b/libs/redmine-issues-cache-writer/src/redmine-issues-cache-writer.module.ts
@@ -17,7 +17,7 @@ export class RedmineIssuesCacheWriterModule {
           useValue: params.issueDocumentScope,
         },
       ],
-      exports: [],
+      exports: [RedmineIssuesCacheWriterService],
     };
   }
 }
diff --git a/libs/redmine-issues-cache-writer/src/redmine-issues-cache-writer.service.ts b/libs/redmine-issues-cache-writer/src/redmine-issues-cache-writer.service.ts
index 82cf6fd..943a847 100644
--- a/libs/redmine-issues-cache-writer/src/redmine-issues-cache-writer.service.ts
+++ b/libs/redmine-issues-cache-writer/src/redmine-issues-cache-writer.service.ts
@@ -1,6 +1,7 @@
 import { Inject, Injectable } from '@nestjs/common';
 import { RedmineTypes } from 'libs/redmine-types';
 import nano from 'nano';
+import { SaveResponse } from './save-response';
 
 @Injectable()
 export class RedmineIssuesCacheWriterService {
@@ -9,21 +10,61 @@ export class RedmineIssuesCacheWriterService {
     private issueDb: nano.DocumentScope<RedmineTypes.Issue>,
   ) {}
 
-  async saveIssue(issue: any): Promise<void> {
+  async saveIssue(issue: any): Promise<SaveResponse> {
     const id = Number(issue['id']);
-    let prevIssue;
+    let prevIssue: (nano.DocumentGetResponse & RedmineTypes.Issue) | null;
     try {
       prevIssue = await this.issueDb.get(String(id));
     } catch (ex) {
       prevIssue = null;
     }
+    let newIssue: nano.DocumentGetResponse & RedmineTypes.Issue;
     if (!prevIssue) {
-      await this.issueDb.insert({ _id: String(id), ...issue });
+      newIssue = { ...issue };
+      newIssue._id = String(id);
+      await this.issueDb.insert(newIssue);
     } else {
-      const newIssue = issue;
+      const newIssue = { ...issue };
       newIssue._id = String(id);
       newIssue._rev = prevIssue._rev;
       await this.issueDb.insert(newIssue);
     }
+    return {
+      prev: prevIssue,
+      current: newIssue,
+      journalsDiff: this.getJournalsDiff(prevIssue, newIssue),
+    };
+  }
+
+  getJournalsDiff(
+    prev: (nano.DocumentGetResponse & RedmineTypes.Issue) | null,
+    current: nano.DocumentGetResponse & RedmineTypes.Issue,
+  ): RedmineTypes.Journal[] {
+    if (
+      (!prev || !prev.journals || prev.journals.length === 0) &&
+      current.journals
+    ) {
+      return current.journals;
+    } else if (prev.journals && current.journals) {
+      return this.calcJournalsDiff(prev.journals, current.journals);
+    }
+    return [];
+  }
+
+  private calcJournalsDiff(
+    prev: RedmineTypes.Journal[],
+    current: RedmineTypes.Journal[],
+  ): RedmineTypes.Journal[] {
+    const res: RedmineTypes.Journal[] = [];
+
+    const prevIds = prev.map((item) => item.id);
+
+    for (let i = 0; i < current.length; i++) {
+      const currentItem = current[i];
+      if (!prevIds.includes(currentItem.id)) {
+        res.push(currentItem);
+      }
+    }
+    return res;
   }
 }
diff --git a/libs/redmine-issues-cache-writer/src/save-response.ts b/libs/redmine-issues-cache-writer/src/save-response.ts
new file mode 100644
index 0000000..fedc9c4
--- /dev/null
+++ b/libs/redmine-issues-cache-writer/src/save-response.ts
@@ -0,0 +1,7 @@
+import { RedmineTypes } from 'libs/redmine-types';
+
+export type SaveResponse = {
+  prev: RedmineTypes.Issue | null;
+  current: RedmineTypes.Issue;
+  journalsDiff: RedmineTypes.Journal[];
+};