diff --git a/package-lock.json b/package-lock.json
index 0d7bbb0e..eca63da5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -461,9 +461,9 @@
 			}
 		},
 		"typescript": {
-			"version": "4.2.3",
-			"resolved": "https://registry.npmjs.org/typescript/-/typescript-4.2.3.tgz",
-			"integrity": "sha512-qOcYwxaByStAWrBf4x0fibwZvMRG+r4cQoTjbPtUlrWjBHbmCAww1i448U0GJ+3cNNEtebDteo/cHOR3xJ4wEw==",
+			"version": "4.2.4",
+			"resolved": "https://registry.npmjs.org/typescript/-/typescript-4.2.4.tgz",
+			"integrity": "sha512-V+evlYHZnQkaz8TRBuxTA92yZBPotr5H+WhQ7bD3hZUndx5tGOa1fuCgeSjxAzM1RiN5IzvadIXTVefuuwZCRg==",
 			"dev": true
 		},
 		"which": {
diff --git a/package.json b/package.json
index 68d17411..8a9aa137 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
 		"pretty-quick": "^3.1.0",
 		"requirejs": "^2.3.6",
 		"terser": "^5.6.0",
-		"typescript": "^4.2.3"
+		"typescript": "^4.2.4"
 	},
 	"husky": {
 		"hooks": {
diff --git a/src/lib/typescriptServices-amd.js b/src/lib/typescriptServices-amd.js
index 4e113ea5..af79b3e1 100644
--- a/src/lib/typescriptServices-amd.js
+++ b/src/lib/typescriptServices-amd.js
@@ -293,7 +293,7 @@ var ts;
     // The following is baselined as a literal template type without intervention
     /** The version of the TypeScript compiler release */
     // eslint-disable-next-line @typescript-eslint/no-inferrable-types
-    ts.version = "4.2.3";
+    ts.version = "4.2.4";
     /* @internal */
     var Comparison;
     (function (Comparison) {
@@ -46611,7 +46611,9 @@ var ts;
             var result = new Type(checker, flags);
             typeCount++;
             result.id = typeCount;
-            typeCatalog.push(result);
+            if (ts.tracing) {
+                typeCatalog.push(result);
+            }
             return result;
         }
         function createOriginType(flags) {
@@ -148422,7 +148424,7 @@ var ts;
         };
         SignatureObject.prototype.getJsDocTags = function () {
             if (this.jsDocTags === undefined) {
-                this.jsDocTags = this.declaration ? getJsDocTags([this.declaration], this.checker) : [];
+                this.jsDocTags = this.declaration ? getJsDocTagsOfSignature(this.declaration, this.checker) : [];
             }
             return this.jsDocTags;
         };
@@ -148436,15 +148438,13 @@ var ts;
     function hasJSDocInheritDocTag(node) {
         return ts.getJSDocTags(node).some(function (tag) { return tag.tagName.text === "inheritDoc"; });
     }
-    function getJsDocTags(declarations, checker) {
-        var tags = ts.JsDoc.getJsDocTagsFromDeclarations(declarations);
-        if (tags.length === 0 || declarations.some(hasJSDocInheritDocTag)) {
-            ts.forEachUnique(declarations, function (declaration) {
-                var inheritedTags = findBaseOfDeclaration(checker, declaration, function (symbol) { return symbol.getJsDocTags(); });
-                if (inheritedTags) {
-                    tags = __spreadArray(__spreadArray([], inheritedTags), tags);
-                }
-            });
+    function getJsDocTagsOfSignature(declaration, checker) {
+        var tags = ts.JsDoc.getJsDocTagsFromDeclarations([declaration]);
+        if (tags.length === 0 || hasJSDocInheritDocTag(declaration)) {
+            var inheritedTags = findBaseOfDeclaration(checker, declaration, function (symbol) { var _a; return ((_a = symbol.declarations) === null || _a === void 0 ? void 0 : _a.length) === 1 ? symbol.getJsDocTags() : undefined; });
+            if (inheritedTags) {
+                tags = __spreadArray(__spreadArray([], inheritedTags), tags);
+            }
         }
         return tags;
     }
diff --git a/src/lib/typescriptServices.js b/src/lib/typescriptServices.js
index 6142d712..0e7de0f2 100644
--- a/src/lib/typescriptServices.js
+++ b/src/lib/typescriptServices.js
@@ -293,7 +293,7 @@ var ts;
     // The following is baselined as a literal template type without intervention
     /** The version of the TypeScript compiler release */
     // eslint-disable-next-line @typescript-eslint/no-inferrable-types
-    ts.version = "4.2.3";
+    ts.version = "4.2.4";
     /* @internal */
     var Comparison;
     (function (Comparison) {
@@ -46611,7 +46611,9 @@ var ts;
             var result = new Type(checker, flags);
             typeCount++;
             result.id = typeCount;
-            typeCatalog.push(result);
+            if (ts.tracing) {
+                typeCatalog.push(result);
+            }
             return result;
         }
         function createOriginType(flags) {
@@ -148422,7 +148424,7 @@ var ts;
         };
         SignatureObject.prototype.getJsDocTags = function () {
             if (this.jsDocTags === undefined) {
-                this.jsDocTags = this.declaration ? getJsDocTags([this.declaration], this.checker) : [];
+                this.jsDocTags = this.declaration ? getJsDocTagsOfSignature(this.declaration, this.checker) : [];
             }
             return this.jsDocTags;
         };
@@ -148436,15 +148438,13 @@ var ts;
     function hasJSDocInheritDocTag(node) {
         return ts.getJSDocTags(node).some(function (tag) { return tag.tagName.text === "inheritDoc"; });
     }
-    function getJsDocTags(declarations, checker) {
-        var tags = ts.JsDoc.getJsDocTagsFromDeclarations(declarations);
-        if (tags.length === 0 || declarations.some(hasJSDocInheritDocTag)) {
-            ts.forEachUnique(declarations, function (declaration) {
-                var inheritedTags = findBaseOfDeclaration(checker, declaration, function (symbol) { return symbol.getJsDocTags(); });
-                if (inheritedTags) {
-                    tags = __spreadArray(__spreadArray([], inheritedTags), tags);
-                }
-            });
+    function getJsDocTagsOfSignature(declaration, checker) {
+        var tags = ts.JsDoc.getJsDocTagsFromDeclarations([declaration]);
+        if (tags.length === 0 || hasJSDocInheritDocTag(declaration)) {
+            var inheritedTags = findBaseOfDeclaration(checker, declaration, function (symbol) { var _a; return ((_a = symbol.declarations) === null || _a === void 0 ? void 0 : _a.length) === 1 ? symbol.getJsDocTags() : undefined; });
+            if (inheritedTags) {
+                tags = __spreadArray(__spreadArray([], inheritedTags), tags);
+            }
         }
         return tags;
     }
diff --git a/src/lib/typescriptServicesMetadata.ts b/src/lib/typescriptServicesMetadata.ts
index f8dc83a7..01ba296c 100644
--- a/src/lib/typescriptServicesMetadata.ts
+++ b/src/lib/typescriptServicesMetadata.ts
@@ -2,4 +2,4 @@
 // **NOTE**: Do not edit directly! This file is generated using `npm run import-typescript`
 //
 
-export const typescriptVersion = "4.2.3";
+export const typescriptVersion = "4.2.4";
diff --git a/src/monaco.contribution.ts b/src/monaco.contribution.ts
index d1f0ea3c..a2f8984d 100644
--- a/src/monaco.contribution.ts
+++ b/src/monaco.contribution.ts
@@ -156,6 +156,10 @@ export interface DiagnosticsOptions {
 	noSemanticValidation?: boolean;
 	noSyntaxValidation?: boolean;
 	noSuggestionDiagnostics?: boolean;
+	/**
+	 * Limit diagnostic computation to only visible files.
+	 * Defaults to false.
+	 */
 	onlyVisible?: boolean;
 	diagnosticCodesToIgnore?: number[];
 }