diff --git a/extensions/shared.tsconfig.json b/extensions/shared.tsconfig.json
index 1cbda1bf9f01323d44be9948541e2172b0bc2a02..bb42dd479cfadb60bc936e5250c1ab4467cf3cd5 100644
--- a/extensions/shared.tsconfig.json
+++ b/extensions/shared.tsconfig.json
@@ -1,11 +1,7 @@
 {
 	"compilerOptions": {
-		"target": "es2017",
+		"target": "es2018",
 		"module": "commonjs",
-		"lib": [
-			"es6",
-			"es2015.promise"
-		],
 		"strict": true,
 		"alwaysStrict": true,
 		"noImplicitAny": true,
diff --git a/extensions/typescript-language-features/src/features/bufferSyncSupport.ts b/extensions/typescript-language-features/src/features/bufferSyncSupport.ts
index 4cf76147d167abae3690fedc8ab34856c440a137..bf63c3fef4941c7d44201e45f05756229aa856c4 100644
--- a/extensions/typescript-language-features/src/features/bufferSyncSupport.ts
+++ b/extensions/typescript-language-features/src/features/bufferSyncSupport.ts
@@ -157,8 +157,7 @@ class GetErrRequest {
 		};
 
 		client.executeAsync('geterr', args, _token.token)
-			.catch(() => true)
-			.then(() => {
+			.finally(() => {
 				if (this._done) {
 					return;
 				}