diff --git a/build.sbt b/build.sbt
index c4b03bd..95a34f6 100644
--- a/build.sbt
+++ b/build.sbt
@@ -4,7 +4,7 @@ import sbtversionpolicy.withsbtrelease.ReleaseVersion
 
 val contentEntityVersion = "3.0.3"
 val scroogeVersion = "22.1.0"   // remember to also update plugins.sbt if the scrooge version changes
-val thriftVersion = "0.15.0"    // remember to also update package.json if the thrift version changes
+val thriftVersion = "0.20.0"    // remember to also update package.json if the thrift version changes
 
 val artifactProductionSettings = Seq(
   organization := "com.gu",
diff --git a/package-lock.json b/package-lock.json
index f81ab6e..6e22b91 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,9 @@
       "license": "Apache-2.0",
       "dependencies": {
         "thrift": "^0.20.0"
+      },
+      "devDependencies": {
+        "typescript": "^4.5.4"
       }
     },
     "node_modules/async-limiter": {
@@ -60,6 +63,19 @@
         "node": ">= 10.18.0"
       }
     },
+    "node_modules/typescript": {
+      "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",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=4.2.0"
+      }
+    },
     "node_modules/ws": {
       "version": "5.2.4",
       "resolved": "https://registry.npmjs.org/ws/-/ws-5.2.4.tgz",
diff --git a/package.json b/package.json
index 9897b51..cb28273 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,9 @@
   "dependencies": {
     "thrift": "^0.20.0"
   },
+  "devDependencies": {
+    "typescript": "^4.5.4"
+  },
   "license": "Apache-2.0",
   "files": [
     "js/main.js",