diff --git a/package-lock.json b/package-lock.json
index ae30086..8c90a86 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,7 +17,7 @@
         "np": "^6.5.0",
         "ts-node": "^9.1.1",
         "tslint": "^6.1.3",
-        "typescript": "^3.9.9"
+        "typescript": "^4.4.3"
       },
       "engines": {
         "node": ">=10"
@@ -7321,9 +7321,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "3.9.9",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.9.tgz",
-      "integrity": "sha512-kdMjTiekY+z/ubJCATUPlRDl39vXYiMV9iyeMuEuXZh2we6zz80uovNN2WlAxmmdE/Z/YQe+EbOEXB5RHEED3w==",
+      "version": "4.9.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
+      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
       "dev": true,
       "bin": {
         "tsc": "bin/tsc",
@@ -13687,9 +13687,9 @@
       }
     },
     "typescript": {
-      "version": "3.9.9",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.9.tgz",
-      "integrity": "sha512-kdMjTiekY+z/ubJCATUPlRDl39vXYiMV9iyeMuEuXZh2we6zz80uovNN2WlAxmmdE/Z/YQe+EbOEXB5RHEED3w==",
+      "version": "4.9.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
+      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
       "dev": true
     },
     "unique-string": {
diff --git a/package.json b/package.json
index 6a52ace..7668e93 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "np": "^6.5.0",
     "ts-node": "^9.1.1",
     "tslint": "^6.1.3",
-    "typescript": "^3.9.9"
+    "typescript": "^4.4.3"
   },
   "dependencies": {
     "snowflake-sdk": "^1.9.0"
diff --git a/src/Statement.ts b/src/Statement.ts
index ef6cc2f..5fedafe 100644
--- a/src/Statement.ts
+++ b/src/Statement.ts
@@ -8,7 +8,7 @@ import { StreamRowsOptions } from './types/StreamRowsOptions';
 export class Statement {
   private rows: any[] = null;
   private stmt: any = null;
-  private executePromise: Promise<Statement> = null;
+  private executePromise: Promise<void> = null;
 
   /**
    * @param connection the connection object from the SDK