diff --git a/.github/workflows/jsonrpc_api.yml b/.github/workflows/jsonrpc_api.yml
index 4d58de1e5..0d4203be4 100644
--- a/.github/workflows/jsonrpc_api.yml
+++ b/.github/workflows/jsonrpc_api.yml
@@ -31,10 +31,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Use Node.js 14.x
+      - name: Use Node.js 16.x
         uses: actions/setup-node@v1
         with:
-          node-version: 14.x
+          node-version: 16.x
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
@@ -42,18 +42,18 @@ jobs:
           override: true
       - name: Rust Cache
         uses: Swatinem/rust-cache@v1.3.0
-      - name: npm ci
+      - name: npm i
         run: |
           cd deltachat-jsonrpc/typescript
-          npm ci
-      - name: npm run generate_bindings
+          npm i
+      - name: npm run generate-bindings
         run: |
           cd deltachat-jsonrpc/typescript
-          npm run generate_bindings
-      - name: npm run check_ts
+          npm run generate-bindings
+      - name: npm run check ts
         run: |
           cd deltachat-jsonrpc/typescript
-          npm run check_ts
+          npx tsc --noEmit
       - name: run integration tests
         run: |
           cd deltachat-jsonrpc/typescript
diff --git a/deltachat-jsonrpc/src/api/mod.rs b/deltachat-jsonrpc/src/api/mod.rs
index 638e9b7c4..26b09b6cb 100644
--- a/deltachat-jsonrpc/src/api/mod.rs
+++ b/deltachat-jsonrpc/src/api/mod.rs
@@ -57,7 +57,7 @@ impl CommandApi {
     //  Misc top level functions
     // ---------------------------------------------
 
-    // Check if an email address is valid.
+    /// Check if an email address is valid.
     async fn check_email_validity(&self, email: String) -> bool {
         may_be_valid_addr(&email)
     }
diff --git a/deltachat-jsonrpc/typescript/generated/client.ts b/deltachat-jsonrpc/typescript/generated/client.ts
index c18957abb..da1561440 100644
--- a/deltachat-jsonrpc/typescript/generated/client.ts
+++ b/deltachat-jsonrpc/typescript/generated/client.ts
@@ -14,7 +14,9 @@ interface Transport {
 export class RawClient {
   constructor(private _transport: Transport) {}
 
-
+  /**
+   * Check if an email address is valid.
+   */
   public checkEmailValidity(email: string): Promise<boolean> {
     return (this._transport.request('check_email_validity', [email] as RPC.Params)) as Promise<boolean>;
   }