diff --git a/.gitignore b/.gitignore
index e885c59..e3d29d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ composer.lock
 phpunit.xml
 infection.json
 infection-log.txt
+.phpunit.result.cache
diff --git a/.travis.yml b/.travis.yml
index c8f60c9..3eb6fc8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,9 @@
 language: php
 
 php:
-  - 7.1
   - 7.2
   - 7.3
+  - 7.4snapshot
 
 env:
   matrix:
@@ -29,7 +29,7 @@ jobs:
       env: COMPOSER_FLAGS="--ignore-platform-reqs"
 
     - stage: test with coverage
-      php: 7.1
+      php: 7.3
       env: COMPOSER_FLAGS=""
       before_install: skip
       script: vendor/bin/phpunit --colors --coverage-clover=clover.xml --coverage-text
@@ -37,7 +37,7 @@ jobs:
         - wget https://scrutinizer-ci.com/ocular.phar; php ocular.phar code-coverage:upload --format=php-clover clover.xml
 
     - stage: infection
-      php: 7.1
+      php: 7.3
       env: COMPOSER_FLAGS=""
       before_install: skip
       script: vendor/bin/infection --log-verbosity=none --threads=4 --min-covered-msi=68 --min-msi=68
diff --git a/composer.json b/composer.json
index 32311ad..0a73bf3 100644
--- a/composer.json
+++ b/composer.json
@@ -3,16 +3,17 @@
     "description": "Doctrine Cache adapter for PSR-16 Simple Cache",
     "type": "library",
     "require": {
-        "php": "^7.1,<7.4",
+        "php": "^7.2,<7.5",
         "doctrine/cache": "^1.7",
         "psr/simple-cache": "^1.0"
     },
     "require-dev": {
-        "cache/integration-tests": "dev-master#05f9717",
-        "cache/tag-interop": "dev-master#992b7ed",
-        "phpunit/phpunit": "^6.5 || ^7.0",
-        "infection/infection": "^0.11.2",
-        "symfony/console": "^3.4 || ^4.2"
+        "cache/integration-tests": "dev-master",
+        "cache/tag-interop": "dev-master",
+        "infection/infection": "^0.14.2",
+        "phpunit/phpunit": "^8.4",
+        "symfony/console": "^4.3",
+        "symfony/phpunit-bridge": "^4.4@dev"
     },
     "license": "MIT",
     "authors": [