diff --git a/package.json b/package.json
index 837ec9f70..89b819275 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "@babel/preset-env": "7.14.4",
     "@babel/preset-react": "7.13.13",
     "@babel/preset-typescript": "7.13.0",
-    "@polkadot/ts": "0.3.68",
+    "@polkadot/ts": "0.3.78",
     "@polkadot/types": "2.10.1",
     "@storybook/addon-a11y": "6.2.9",
     "@storybook/addon-actions": "6.2.9",
diff --git a/yarn.lock b/yarn.lock
index 583f438f5..b8a503211 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2524,10 +2524,10 @@
     bn.js "^4.11.9"
     eventemitter3 "^4.0.7"
 
-"@polkadot/ts@0.3.68":
-  version "0.3.68"
-  resolved "https://registry.yarnpkg.com/@polkadot/ts/-/ts-0.3.68.tgz#6d82f5b13d893f33d825210361af3e8aac52316b"
-  integrity sha512-ulMTYbedhokKL8aEPiGDeHb+scy02ebQg8LznBm7iG5yXzMbSc4pvCVoahYgdcY20MqcleKjSjVxFtK6OfM6Fw==
+"@polkadot/ts@0.3.78":
+  version "0.3.78"
+  resolved "https://registry.yarnpkg.com/@polkadot/ts/-/ts-0.3.78.tgz#97fe52388416c031f42698fac50182ba2e4578ff"
+  integrity sha512-7no7sWIzvM4N8fjhfhc7SKbqcswsjZ7pZcVz3iLSKSTcvx61bvUx6gWB/wFGXlgnPUBcO4CmBZd1PPlABQEABQ==
   dependencies:
     "@types/chrome" "^0.0.143"