diff --git a/.github/workflows/bench.yaml b/.github/workflows/bench.yaml
index d346282..5f61be9 100644
--- a/.github/workflows/bench.yaml
+++ b/.github/workflows/bench.yaml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   bench:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v1
 
diff --git a/.github/workflows/cli.yml b/.github/workflows/cli.yml
index 8af5547..c8b0280 100644
--- a/.github/workflows/cli.yml
+++ b/.github/workflows/cli.yml
@@ -11,13 +11,13 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-11.0, ubuntu-18.04, windows-2019, self-hosted-linux-arm64]
+        os: [macos-11.0, ubuntu-20.04, windows-2019, self-hosted-linux-arm64]
         include:
           - os: macos-11.0
             ARCH: macos-x86_64
             MIME: application/octet-stream
             EXT: ''
-          - os: ubuntu-18.04
+          - os: ubuntu-20.04
             ARCH: linux-x86_64
             MIME: application/octet-stream
             EXT: ''
diff --git a/.github/workflows/deno.yml b/.github/workflows/deno.yml
index 31dd5e1..a3ec239 100644
--- a/.github/workflows/deno.yml
+++ b/.github/workflows/deno.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v1
 
diff --git a/.github/workflows/fuzz.yml b/.github/workflows/fuzz.yml
index 21a3d9e..9863c1e 100644
--- a/.github/workflows/fuzz.yml
+++ b/.github/workflows/fuzz.yml
@@ -5,7 +5,7 @@ on:
 
 jobs:
   fuzz:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v1
 
diff --git a/.github/workflows/java.yml b/.github/workflows/java.yml
index 49704b2..b689542 100644
--- a/.github/workflows/java.yml
+++ b/.github/workflows/java.yml
@@ -11,12 +11,12 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-11.0, ubuntu-18.04, windows-2019]
+        os: [macos-11.0, ubuntu-20.04, windows-2019]
         include:
           - os: macos-11.0
             ARCH: macos-x86_64
             FILE: 'libminify_html_java.dylib'
-          - os: ubuntu-18.04
+          - os: ubuntu-20.04
             ARCH: linux-x86_64
             FILE: 'libminify_html_java.so'
           - os: windows-2019
@@ -47,7 +47,7 @@ jobs:
           path: ./java/target/rust/release/${{ matrix.FILE }}
 
   package:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     needs: build
     steps:
       - uses: actions/checkout@v1
diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index f97f05f..c1ad01a 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-11.0, ubuntu-18.04, windows-2019, self-hosted-linux-arm64]
+        os: [macos-11.0, ubuntu-20.04, windows-2019, self-hosted-linux-arm64]
     steps:
       - uses: actions/checkout@v1
 
@@ -55,7 +55,7 @@ jobs:
           file: ./nodejs/index.node
 
   package:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     needs: build
     steps:
       - uses: actions/checkout@v1
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index 5864029..4a5a5d9 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         variant: [main, onepass]
-        os: [macos-11.0, ubuntu-18.04, windows-2019, self-hosted-linux-arm64]
+        os: [macos-11.0, ubuntu-20.04, windows-2019, self-hosted-linux-arm64]
         python: ['3.8', '3.9', '3.10', '3.11']
     steps:
       - uses: actions/checkout@v1
diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index d8bf936..cccda89 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -11,10 +11,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-18.04, macos-11.0]
+        os: [ubuntu-20.04, macos-11.0]
         ruby: [2.5.7, 2.6.5, 2.7.0]
         include:
-          - os: ubuntu-18.04
+          - os: ubuntu-20.04
             NAME: linux
             FILE: 'libminify_html_ruby_lib.so'
           - os: macos-11.0
@@ -85,7 +85,7 @@ jobs:
           b2 upload-file ${{ secrets.CICD_CLI_B2_BUCKET_NAME }} ./ruby/target/release/${{ matrix.FILE }} minify-html/bin/ruby/${{ steps.version.outputs.VERSION }}/${{ steps.native_file.outputs.NAME }}
 
   package:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     needs: build
     steps:
       - uses: actions/checkout@v1
diff --git a/.github/workflows/wasm.yml b/.github/workflows/wasm.yml
index e1aab7d..6b4cce6 100644
--- a/.github/workflows/wasm.yml
+++ b/.github/workflows/wasm.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v1
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f5cad0c..ab7d0d9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # minify-html changelog
 
+## Pending
+
+- Bump GitHub Actions Ubuntu image version.
+
 ## 0.11.0
 
 - Change the default CSS minifier optimisation level to 1, as higher levels may perform dangerous optimisations.