diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b18a5f15..b7fb875c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -133,6 +133,6 @@ jobs:
     - name: Set up Node prefix
       run: npm config set prefix $NPM_PREFIX
     - name: Set up prettier
-      run: npm install --global prettier@2.0.5
+      run: npm install --global prettier@2.3.1
     - name: Check style
       run: ./tools/checkstyle-md.sh
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 5fc55bfa..d85e6991 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -143,7 +143,7 @@ format Go files, and [prettier](https://prettier.io/) to format Markdown files.
 
 ```sh
 go get golang.org/x/tools/cmd/goimports
-npm install --global prettier@2.0.5
+npm install --global prettier@2.3.1
 ```
 
 Once you have installed the tools, use `make style` to format Go and Markdown