diff --git a/package.json b/package.json
index 64f6d7ce2..f1a84f055 100644
--- a/package.json
+++ b/package.json
@@ -68,7 +68,7 @@
     "@types/expand-tilde": "^2.0.0",
     "@types/fb-watchman": "^2.0.0",
     "@types/fs-extra": "^8.0.0",
-    "@types/invariant": "^2.2.30",
+    "@types/invariant": "^2.2.31",
     "@types/jest": "^24.0.16",
     "@types/lodash.debounce": "^4.0.6",
     "@types/lodash.isequal": "^4.5.5",
diff --git a/src/Client.tsx b/src/Client.tsx
index 372e5a8de..0d680c479 100644
--- a/src/Client.tsx
+++ b/src/Client.tsx
@@ -332,8 +332,8 @@ export default class Client extends EventEmitter {
       } else if (method === 'refreshPlugins') {
         this.refreshPlugins();
       } else if (method === 'execute') {
-        const params: Params = data.params as Params;
-        invariant(params, 'expected params');
+        invariant(data.params, 'expected params');
+        const params: Params = data.params;
 
         const device = this.getDeviceSync();
         if (device) {
diff --git a/src/ui/components/table/TableHead.tsx b/src/ui/components/table/TableHead.tsx
index c8b697fbd..e0ab083a2 100644
--- a/src/ui/components/table/TableHead.tsx
+++ b/src/ui/components/table/TableHead.tsx
@@ -147,8 +147,8 @@ class TableHeadColumn extends PureComponent<{
       const {parentElement} = this.ref;
       invariant(parentElement, 'expected there to be parentElement');
 
-      const parentWidth = parentElement!.clientWidth;
-      const {childNodes} = parentElement!;
+      const parentWidth = parentElement.clientWidth;
+      const {childNodes} = parentElement;
 
       const lastElem = childNodes[childNodes.length - 1];
       const right =
diff --git a/yarn.lock b/yarn.lock
index d43b046a5..570bcbd8d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1233,10 +1233,10 @@
     "@types/react" "*"
     hoist-non-react-statics "^3.3.0"
 
-"@types/invariant@^2.2.30":
-  version "2.2.30"
-  resolved "https://registry.yarnpkg.com/@types/invariant/-/invariant-2.2.30.tgz#20efa342807606ada5483731a8137cb1561e5fe9"
-  integrity sha512-98fB+yo7imSD2F7PF7GIpELNgtLNgo5wjivu0W5V4jx+KVVJxo6p/qN4zdzSTBWy4/sN3pPyXwnhRSD28QX+ag==
+"@types/invariant@^2.2.31":
+  version "2.2.31"
+  resolved "https://registry.yarnpkg.com/@types/invariant/-/invariant-2.2.31.tgz#4444c03004f215289dbca3856538434317dd28b2"
+  integrity sha512-jMlgg9pIURvy9jgBHCjQp/CyBjYHUwj91etVcDdXkFl2CwTFiQlB+8tcsMeXpXf2PFE5X2pjk4Gm43hQSMHAdA==
 
 "@types/istanbul-lib-coverage@*", "@types/istanbul-lib-coverage@^2.0.0":
   version "2.0.1"