diff --git a/src/becca/entities/abstract_becca_entity.ts b/src/becca/entities/abstract_becca_entity.ts
index 53999be68..6be7f7d92 100644
--- a/src/becca/entities/abstract_becca_entity.ts
+++ b/src/becca/entities/abstract_becca_entity.ts
@@ -33,10 +33,11 @@ abstract class AbstractBeccaEntity<T extends AbstractBeccaEntity<T>> {
     protected utcDateModified?: string;
     protected dateCreated?: string;
     protected dateModified?: string;
-    protected isProtected?: boolean;
     protected isSynced?: boolean;
-
+    
     protected blobId?: string;
+ 
+    isProtected?: boolean;
 
     protected beforeSaving() {
         const constructorData = (this.constructor as unknown as ConstructorData<T>);
diff --git a/src/routes/api/revisions.js b/src/routes/api/revisions.js
index e4a843016..33f6fc144 100644
--- a/src/routes/api/revisions.js
+++ b/src/routes/api/revisions.js
@@ -1,7 +1,7 @@
 "use strict";
 
 const beccaService = require('../../becca/becca_service.js');
-const revisionService = require('../../services/revisions.js');
+const revisionService = require('../../services/revisions');
 const utils = require('../../services/utils');
 const sql = require('../../services/sql');
 const cls = require('../../services/cls');
diff --git a/src/routes/routes.js b/src/routes/routes.js
index cd323231c..02f69d5d9 100644
--- a/src/routes/routes.js
+++ b/src/routes/routes.js
@@ -28,7 +28,7 @@ const branchesApiRoute = require('./api/branches.js');
 const attachmentsApiRoute = require('./api/attachments.js');
 const autocompleteApiRoute = require('./api/autocomplete.js');
 const cloningApiRoute = require('./api/cloning.js');
-const revisionsApiRoute = require('./api/revisions.js');
+const revisionsApiRoute = require('./api/revisions');
 const recentChangesApiRoute = require('./api/recent_changes.js');
 const optionsApiRoute = require('./api/options.js');
 const passwordApiRoute = require('./api/password');
diff --git a/src/services/bulk_actions.js b/src/services/bulk_actions.js
index 3a274c688..ab8bed739 100644
--- a/src/services/bulk_actions.js
+++ b/src/services/bulk_actions.js
@@ -1,5 +1,5 @@
 const log = require('./log');
-const revisionService = require('./revisions.js');
+const revisionService = require('./revisions');
 const becca = require('../becca/becca');
 const cloningService = require('./cloning.js');
 const branchService = require('./branches.js');
diff --git a/src/services/consistency_checks.js b/src/services/consistency_checks.js
index 5d9ef5104..60d5c57df 100644
--- a/src/services/consistency_checks.js
+++ b/src/services/consistency_checks.js
@@ -9,7 +9,7 @@ const cls = require('./cls');
 const entityChangesService = require('./entity_changes');
 const optionsService = require('./options');
 const BBranch = require('../becca/entities/bbranch');
-const revisionService = require('./revisions.js');
+const revisionService = require('./revisions');
 const becca = require('../becca/becca');
 const utils = require('../services/utils');
 const eraseService = require('../services/erase.js');
diff --git a/src/services/erase.js b/src/services/erase.js
index 4c225428b..2d3fb3691 100644
--- a/src/services/erase.js
+++ b/src/services/erase.js
@@ -1,5 +1,5 @@
 const sql = require("./sql");
-const revisionService = require("./revisions.js");
+const revisionService = require("./revisions");
 const log = require("./log.ts");
 const entityChangesService = require("./entity_changes");
 const optionService = require("./options");
diff --git a/src/services/notes.js b/src/services/notes.js
index 47fc0ab32..373af1e12 100644
--- a/src/services/notes.js
+++ b/src/services/notes.js
@@ -7,7 +7,7 @@ const cls = require('../services/cls');
 const protectedSessionService = require('../services/protected_session');
 const log = require('../services/log');
 const utils = require('../services/utils');
-const revisionService = require('./revisions.js');
+const revisionService = require('./revisions');
 const request = require('./request.js');
 const path = require('path');
 const url = require('url');
diff --git a/src/services/revisions.js b/src/services/revisions.ts
similarity index 79%
rename from src/services/revisions.js
rename to src/services/revisions.ts
index 7697a35f4..62ba45cd8 100644
--- a/src/services/revisions.js
+++ b/src/services/revisions.ts
@@ -1,14 +1,12 @@
 "use strict";
 
-const log = require('./log');
-const sql = require('./sql');
-const protectedSessionService = require('./protected_session');
-const dateUtils = require('./date_utils');
+import log = require('./log');
+import sql = require('./sql');
+import protectedSessionService = require('./protected_session');
+import dateUtils = require('./date_utils');
+import BNote = require('../becca/entities/bnote');
 
-/**
- * @param {BNote} note
- */
-function protectRevisions(note) {
+function protectRevisions(note: BNote) {
     if (!protectedSessionService.isProtectedSessionAvailable()) {
         throw new Error(`Cannot (un)protect revisions of note '${note.noteId}' without active protected session`);
     }
@@ -18,7 +16,7 @@ function protectRevisions(note) {
             try {
                 const content = revision.getContent();
 
-                revision.isProtected = note.isProtected;
+                revision.isProtected = !!note.isProtected;
 
                 // this will force de/encryption
                 revision.setContent(content, {forceSave: true});