diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 269a37438..ad514ac50 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -96,7 +96,7 @@ jobs:
     - name: Install nodejs
       uses: actions/setup-node@v4
       with:
-        node-version: "18.16.1"
+        node-version: "20.9.0"
         cache: "pnpm"
         cache-dependency-path: "**/pnpm-lock.yaml"
     - name: Install nodejs dependencies
diff --git a/Dockerfile b/Dockerfile
index 8320bf151..235336689 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -33,7 +33,7 @@ WORKDIR /kargo/bin
 ####################################################################################################
 # ui-builder
 ####################################################################################################
-FROM --platform=$BUILDPLATFORM docker.io/library/node:20.8.1 AS ui-builder
+FROM --platform=$BUILDPLATFORM docker.io/library/node:20.9.0 AS ui-builder
 
 RUN npm install --global pnpm
 WORKDIR /ui
diff --git a/Dockerfile.dev b/Dockerfile.dev
index fff5971e8..98e60c72c 100644
--- a/Dockerfile.dev
+++ b/Dockerfile.dev
@@ -6,7 +6,7 @@ ARG BUF_VERSION=v1.26.1
 ARG CONTROLLER_GEN_VERSION=v0.13.0
 ARG GOLANGCI_LINT_VERSION=1.54.2
 ARG HELM_VERSION=v3.12.3
-ARG NODE_MAJOR=18
+ARG NODE_MAJOR=20
 
 RUN go install github.com/bufbuild/buf/cmd/buf@${BUF_VERSION} \
     && go install sigs.k8s.io/controller-tools/cmd/controller-gen@${CONTROLLER_GEN_VERSION} \