diff --git a/package.json b/package.json
index fa29486a..0150569d 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "ts-loader": "^6.0.4",
     "tslint": "^5.18.0",
     "tslint-consistent-codestyle": "^1.13.0",
-    "typescript": "3.6",
+    "typescript": "3.7",
     "utf8": "^3.0.0",
     "webpack": "^4.35.3",
     "webpack-cli": "^3.1.0",
diff --git a/src/browser/Clipboard.ts b/src/browser/Clipboard.ts
index 594e4429..a7c48bfb 100644
--- a/src/browser/Clipboard.ts
+++ b/src/browser/Clipboard.ts
@@ -82,12 +82,12 @@ export function moveTextAreaUnderMouseCursor(ev: MouseEvent, textarea: HTMLTextA
   // Reset the terminal textarea's styling
   // Timeout needs to be long enough for click event to be handled.
   setTimeout(() => {
-    textarea.style.position = null;
-    textarea.style.width = null;
-    textarea.style.height = null;
-    textarea.style.left = null;
-    textarea.style.top = null;
-    textarea.style.zIndex = null;
+    textarea.style.position = '';
+    textarea.style.width = '';
+    textarea.style.height = '';
+    textarea.style.left = '';
+    textarea.style.top = '';
+    textarea.style.zIndex = '';
   }, 200);
 }
 
diff --git a/yarn.lock b/yarn.lock
index c96c390c..cb02cf91 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5184,10 +5184,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@3.6:
-  version "3.6.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.6.3.tgz#fea942fabb20f7e1ca7164ff626f1a9f3f70b4da"
-  integrity sha512-N7bceJL1CtRQ2RiG0AQME13ksR7DiuQh/QehubYcghzv20tnh+MQnQIuJddTmsbqYj+dztchykemz0zFzlvdQw==
+typescript@3.7:
+  version "3.7.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.7.2.tgz#27e489b95fa5909445e9fef5ee48d81697ad18fb"
+  integrity sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==
 
 typescript@^3.5.1:
   version "3.5.1"