diff --git a/.github/workflows/docker_main.yml b/.github/workflows/docker_main.yml
index e50be84..d67bd62 100644
--- a/.github/workflows/docker_main.yml
+++ b/.github/workflows/docker_main.yml
@@ -9,7 +9,7 @@ jobs:
   docker:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Set build tag
         id: build_tag_generator
@@ -25,16 +25,16 @@ jobs:
             --label build_date=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
             --label tag=${{ steps.build_tag_generator.outputs.BUILD_TAG }} \
             --tag ghcr.io/hyperledger/firefly-tokens-erc1155:${{ steps.build_tag_generator.outputs.BUILD_TAG }} .
-      
+
       - name: Tag release
         run: docker tag ghcr.io/hyperledger/firefly-tokens-erc1155:${{ steps.build_tag_generator.outputs.BUILD_TAG }} ghcr.io/hyperledger/firefly-tokens-erc1155:head
-      
+
       - name: Push docker image
         run: |
           echo ${{ secrets.GITHUB_TOKEN }} | docker login ghcr.io -u $GITHUB_ACTOR --password-stdin
           docker push ghcr.io/hyperledger/firefly-tokens-erc1155:${{ steps.build_tag_generator.outputs.BUILD_TAG }}
-      
+
       - name: Push head tag
         run: |
           echo ${{ secrets.GITHUB_TOKEN }} | docker login ghcr.io -u $GITHUB_ACTOR --password-stdin
-          docker push ghcr.io/hyperledger/firefly-tokens-erc1155:head
\ No newline at end of file
+          docker push ghcr.io/hyperledger/firefly-tokens-erc1155:head
diff --git a/.github/workflows/docker_release.yml b/.github/workflows/docker_release.yml
index 038285e..bf9619e 100644
--- a/.github/workflows/docker_release.yml
+++ b/.github/workflows/docker_release.yml
@@ -8,7 +8,7 @@ jobs:
   docker:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -30,7 +30,7 @@ jobs:
         run: |
           echo ${{ secrets.GITHUB_TOKEN }} | docker login ghcr.io -u $GITHUB_ACTOR --password-stdin
           docker push ghcr.io/hyperledger/firefly-tokens-erc1155:${GITHUB_REF##*/}
-      
+
       - name: Push head tag
         run: |
           echo ${{ secrets.GITHUB_TOKEN }} | docker login ghcr.io -u $GITHUB_ACTOR --password-stdin
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index bbe9bc0..65cb078 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,12 +10,12 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Use Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: '16.x'
+          node-version: '20.9.0'
       - run: npm ci
       - run: npm run test
 
@@ -25,12 +25,12 @@ jobs:
       run:
         working-directory: ./samples/solidity
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Use Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: '16.x'
+          node-version: '20.9.0'
       - run: npm ci
       - run: npm run compile
       - run: npm run test
diff --git a/Dockerfile b/Dockerfile
index 5bf960b..67b1d5c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:16-alpine3.15 as solidity-build
+FROM node:20-alpine3.17 as solidity-build
 RUN apk add python3 alpine-sdk
 USER node
 WORKDIR /home/node
@@ -7,14 +7,14 @@ RUN npm install
 ADD --chown=node:node ./samples/solidity .
 RUN npx hardhat compile
 
-FROM node:16-alpine3.15 as build
+FROM node:20-alpine3.17 as build
 WORKDIR /root
 ADD package*.json ./
 RUN npm install
 ADD . .
 RUN npm run build
 
-FROM node:16-alpine3.15 
+FROM node:20-alpine3.17 
 RUN apk add curl
 # We also need to keep copying it to the old location to maintain compatibility with the FireFly CLI
 COPY --from=solidity-build --chown=1001:0 /home/node/artifacts/contracts/ERC1155MixedFungible.sol/ERC1155MixedFungible.json /root/contracts/
diff --git a/test/suites/websocket.ts b/test/suites/websocket.ts
index 2045950..afdf26f 100644
--- a/test/suites/websocket.ts
+++ b/test/suites/websocket.ts
@@ -1095,10 +1095,6 @@ export default (context: TestContext) => {
 
     context.resetConnectedPromise();
 
-    await new Promise(resolve => {
-      setTimeout(resolve, 500);
-    });
-
     await context.server
       .ws('/api/ws')
       .sendJson({