diff --git a/composer.json b/composer.json
index 0666f28..8f10b09 100644
--- a/composer.json
+++ b/composer.json
@@ -17,8 +17,8 @@
     },
     "require": {
         "ext-pcntl": "*",
-        "texthtml/php-lock": "~2.1",
-        "predis/predis": "~1.0",
-        "psr/log": "~1.0"
+        "texthtml/php-lock": "^2.1",
+        "predis/predis": "^1.0|^2.0",
+        "psr/log": "^1.0|^3.0"
     }
 }
diff --git a/tests/RedisSimpleLockFactoryTest.php b/tests/RedisSimpleLockFactoryTest.php
index 45bd09f..7352b95 100644
--- a/tests/RedisSimpleLockFactoryTest.php
+++ b/tests/RedisSimpleLockFactoryTest.php
@@ -10,7 +10,8 @@ class RedisSimpleLockFactoryTest extends TestCase
 
     public function setUp(): void
     {
-        $this->redisClient = new \Predis\Client(getenv('REDIS_URI'));
+        $uri = getenv("REDIS_URI");
+        $this->redisClient = is_string($uri) ? new \Predis\Client($uri) : new \Predis\Client();
         $this->redisClient->flushdb();
     }
 
diff --git a/tests/RedisSimpleLockTest.php b/tests/RedisSimpleLockTest.php
index 5d4cff5..5bd518c 100644
--- a/tests/RedisSimpleLockTest.php
+++ b/tests/RedisSimpleLockTest.php
@@ -9,7 +9,8 @@ class RedisSimpleLockTest extends TestCase
 
     public function setUp(): void
     {
-        $this->redisClient = new \Predis\Client(getenv("REDIS_URI"));
+        $uri = getenv("REDIS_URI");
+        $this->redisClient = is_string($uri) ? new \Predis\Client($uri) : new \Predis\Client();
         $this->redisClient->flushdb();
     }