diff --git a/.github/workflows/create-psalm-container.yml b/.github/workflows/create-psalm-container.yml
index d4b021a3..36407589 100644
--- a/.github/workflows/create-psalm-container.yml
+++ b/.github/workflows/create-psalm-container.yml
@@ -23,7 +23,7 @@ jobs:
       - name: Modify the Dockerfile
         run: |
           set -x
-          sed -i 's|FROM php:7.4-alpine|FROM php:8.0-alpine|' "psalm-github-actions/Dockerfile"
+          sed -i 's|FROM php:7.4-alpine|FROM php:8.1-alpine|' "psalm-github-actions/Dockerfile"
           cat << APCU >> "psalm-github-actions/Dockerfile"
           RUN mkdir -p /usr/src/php/ext/apcu && \
             curl -fsSL https://pecl.php.net/get/apcu | tar xvz -C "/usr/src/php/ext/apcu" --strip 1 && \
diff --git a/.github/workflows/dependency-updates.yml b/.github/workflows/dependency-updates.yml
index 9e0af73e..72a0a5e7 100644
--- a/.github/workflows/dependency-updates.yml
+++ b/.github/workflows/dependency-updates.yml
@@ -13,7 +13,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: nanasess/setup-php@master
       with:
-        php-version: 8.0
+        php-version: 8.1
         extensions: apcu
     - name: Run dependency update script
       run: |
diff --git a/.github/workflows/lint-php.yml b/.github/workflows/lint-php.yml
index 730d2aa4..28fae11b 100644
--- a/.github/workflows/lint-php.yml
+++ b/.github/workflows/lint-php.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: ["8.0"]
+        php-versions: ["8.1"]
 
     name: php-lint
 
diff --git a/.github/workflows/php-deprecation-detector.yml b/.github/workflows/php-deprecation-detector.yml
index bd25a68e..d45feade 100644
--- a/.github/workflows/php-deprecation-detector.yml
+++ b/.github/workflows/php-deprecation-detector.yml
@@ -13,10 +13,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Set up php8.0
+      - name: Set up php8.1
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.0
+          php-version: 8.1
           extensions: apcu
           coverage: none
 
diff --git a/.github/workflows/psalm-analysis.yml b/.github/workflows/psalm-analysis.yml
index 0a5a42ad..5994862c 100644
--- a/.github/workflows/psalm-analysis.yml
+++ b/.github/workflows/psalm-analysis.yml
@@ -12,10 +12,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Set up php8.0
+      - name: Set up php8.1
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.0
+          php-version: 8.1
           extensions: apcu
           coverage: none
 
diff --git a/.github/workflows/psalm-update-baseline.yml b/.github/workflows/psalm-update-baseline.yml
index 8492f071..53f2ec68 100644
--- a/.github/workflows/psalm-update-baseline.yml
+++ b/.github/workflows/psalm-update-baseline.yml
@@ -12,10 +12,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Set up php8.0
+      - name: Set up php8.1
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.0
+          php-version: 8.1
           extensions: apcu
           coverage: none
 
diff --git a/Containers/mastercontainer/Dockerfile b/Containers/mastercontainer/Dockerfile
index 816954b0..a83454e0 100644
--- a/Containers/mastercontainer/Dockerfile
+++ b/Containers/mastercontainer/Dockerfile
@@ -5,7 +5,7 @@ FROM docker:20.10.21-dind-alpine3.16 as dind
 FROM caddy:2.6.2-alpine as caddy
 
 # From https://github.com/docker-library/php/blob/master/8.0/bullseye/apache/Dockerfile
-FROM php:8.0.26-apache-bullseye
+FROM php:8.1.13-apache-bullseye
 
 EXPOSE 80
 EXPOSE 8080
diff --git a/php/composer.json b/php/composer.json
index 5a0d46ed..d20a4fb7 100644
--- a/php/composer.json
+++ b/php/composer.json
@@ -5,7 +5,7 @@
         }
     },
     "require": {
-        "php": "^8.0",
+        "php": "^8.1",
         "ext-json": "*",
         "ext-sodium": "*",
         "ext-curl": "*",
@@ -22,6 +22,6 @@
 		"psalm": "psalm --threads=1",
 		"psalm:update-baseline": "psalm --threads=1 --update-baseline",
 		"lint": "find . -name \\*.php -not -path './vendor/*' -exec php -l {} \\;",
-		"php-deprecation-detector": "find . -name \\*.php -not -path './vendor/*' -exec phpdd scan {} -n -t 8.0 \\;"
+		"php-deprecation-detector": "find . -name \\*.php -not -path './vendor/*' -exec phpdd scan {} -n -t 8.1 \\;"
 	}
 }