diff --git a/.travis.yml b/.travis.yml
index 950b04b4..f5f87162 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -32,9 +32,15 @@ matrix:
 
           # Test LTS versions
         - php: 7.3
-          env: DEPENDENCIES="dunglas/symfony-lock:^3"
+          env: SYMFONY_REQUIRE=3.4.*
         - php: 7.3
-          env: DEPENDENCIES="dunglas/symfony-lock:^4"
+          env: SYMFONY_REQUIRE=4.2.*
+        - php: 7.3
+          env: SYMFONY_REQUIRE=4.3.*
+        - php: 7.3
+          env: SYMFONY_REQUIRE=4.4.*
+        - php: 7.3
+          env: SYMFONY_REQUIRE=5.0.*
 
           # Test with httplug 1.x clients
         - php: 7.2
@@ -56,6 +62,7 @@ before_install:
     - if [[ $COVERAGE != true ]]; then phpenv config-rm xdebug.ini || true; fi
     - if ! [ -z "$STABILITY" ]; then composer config minimum-stability ${STABILITY}; fi;
     - if ! [ -v "$DEPENDENCIES" ]; then composer require --no-update ${DEPENDENCIES}; fi;
+    - composer global require --no-progress --no-scripts --no-plugins symfony/flex
 
 install:
     # To be removed when this issue will be resolved: https://github.com/composer/composer/issues/5355
diff --git a/composer.json b/composer.json
index 062988ca..a4ab80fb 100644
--- a/composer.json
+++ b/composer.json
@@ -55,10 +55,10 @@
         "php-http/promise": "^1.0",
         "polishsymfonycommunity/symfony-mocker-container": "^1.0",
         "symfony/browser-kit": "^3.4.34 || ^4.2.12 || ^5.0",
-        "symfony/cache": "^3.4.34 || ^4.2.12 || ^5.0",
+        "symfony/cache": "^3.4.34 || ~4.2.12 || ^4.3.8 || ^5.0",
         "symfony/dom-crawler": "^3.4.34 || ^4.2.12 || ^5.0",
         "symfony/framework-bundle": "^3.4.34 || ^4.2.12 || ^5.0",
-        "symfony/http-foundation": "^3.4.34 || ^4.2.12 || ^5.0",
+        "symfony/http-foundation": "^3.4.34 || ~4.2.12 || ^4.3.8 || ^5.0",
         "symfony/phpunit-bridge": "^3.4.34 || ^4.2.12 || ^5.0",
         "symfony/stopwatch": "^3.4.34 || ^4.2.12 || ^5.0",
         "symfony/twig-bundle": "^3.4.34 || ^4.2.12 || ^5.0",