diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 528063568..aa8766a20 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -7,14 +7,14 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                php: ['7.1', '7.2', '7.3', '7.4']
+                php: ['7.1', '7.2', '7.3', '7.4', '8.0']
 
             fail-fast: false
 
         name: PHP ${{ matrix.php }} tests
         steps:
             - uses: actions/checkout@v2
-            - uses: shivammathur/setup-php@v1
+            - uses: shivammathur/setup-php@v2
               with:
                   php-version: ${{ matrix.php }}
                   coverage: none
@@ -22,10 +22,10 @@ jobs:
             - run: composer install --no-progress --prefer-dist
             - run: vendor/bin/tester tests -s -C
             - if: failure()
-              uses: actions/upload-artifact@v1
+              uses: actions/upload-artifact@v2
               with:
                   name: output
-                  path: tests/DI/output
+                  path: tests/**/output
 
 
     lowest_dependencies:
@@ -33,7 +33,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - uses: actions/checkout@v2
-            - uses: shivammathur/setup-php@v1
+            - uses: shivammathur/setup-php@v2
               with:
                   php-version: 7.1
                   coverage: none
@@ -47,7 +47,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - uses: actions/checkout@v2
-            - uses: shivammathur/setup-php@v1
+            - uses: shivammathur/setup-php@v2
               with:
                   php-version: 7.4
                   coverage: none
diff --git a/.travis.yml b/.travis.yml
index ee3bbaf96..4072ec244 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ php:
     - 7.2
     - 7.3
     - 7.4
+    - nightly
 
 before_install:
     # turn off XDebug
@@ -62,7 +63,7 @@ jobs:
         -   stage: Code Coverage
 
 
-sudo: false
+dist: xenial
 
 cache:
     directories:
diff --git a/readme.md b/readme.md
index 0cba29d93..e606b7d89 100644
--- a/readme.md
+++ b/readme.md
@@ -29,7 +29,7 @@ The recommended way to install is via Composer:
 composer require nette/di
 ```
 
-It requires PHP version 7.1 and supports PHP up to 7.4.
+It requires PHP version 7.1 and supports PHP up to 8.0.
 
 
 Usage