diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 63683774..efe9129a 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -6,7 +6,7 @@
 # When we update the base image version (which we do manually, prompted by Dependabot
 # notifying us of a new Go version), make sure our new base images is listed at:
 # https://hub.docker.com/_/golang
-FROM golang:1.21.3-bullseye
+FROM golang:1.21.4-bullseye
 
 # This Dockerfile adds a non-root user with sudo access. Use the "remoteUser"
 # property in devcontainer.json to use it. On Linux, the container user's GID/UIDs
diff --git a/.github/workflows/github_tag_and_release.yml b/.github/workflows/github_tag_and_release.yml
index 0e201e4e..72ae0a40 100644
--- a/.github/workflows/github_tag_and_release.yml
+++ b/.github/workflows/github_tag_and_release.yml
@@ -37,7 +37,7 @@ jobs:
         name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.21.3'
+          go-version: '1.21.4'
       -
         name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v5.0.0
diff --git a/.github/workflows/integration_test.yml b/.github/workflows/integration_test.yml
index 9b953750..78a41f57 100644
--- a/.github/workflows/integration_test.yml
+++ b/.github/workflows/integration_test.yml
@@ -16,7 +16,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.21.3'
+          go-version: '1.21.4'
       - name: Checkout code
         uses: actions/checkout@v4
       - name: Tests
diff --git a/.github/workflows/virtual_test.yml b/.github/workflows/virtual_test.yml
index aede70fc..559af0ae 100644
--- a/.github/workflows/virtual_test.yml
+++ b/.github/workflows/virtual_test.yml
@@ -19,7 +19,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.21.3'
+          go-version: '1.21.4'
       - name: Checkout code
         uses: actions/checkout@v4
       - name: Install Hoverfly
diff --git a/Dockerfile b/Dockerfile
index a8f520ba..263e2ffe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.21.3-bullseye AS builder
+FROM golang:1.21.4-bullseye AS builder
 
 WORKDIR /src
 COPY . .