diff --git a/composer.json b/composer.json
index 81fd2b01..966d9fe8 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,15 @@
         "psr/cache": "^2.0||^3.0",
         "psr/simple-cache": "^2.0||^3.0",
         "ext-mbstring": "*",
-        "ext-json": "*"
+        "ext-json": "*",
+        "doctrine/couchdb": "dev-master",
+        "phpfastcache/phpssdb": "~1.1",
+        "predis/predis": "~1.1",
+        "mongodb/mongodb": "~1.9",
+        "triagens/arangodb": "~3.8",
+        "aws/aws-sdk-php": "~3.2",
+        "google/cloud-firestore": "~1.20",
+        "solarium/solarium": "~6.1"
     },
     "require-dev": {
         "league/climate": "^3.8",
diff --git a/lib/Phpfastcache/Drivers/Solr/Driver.php b/lib/Phpfastcache/Drivers/Solr/Driver.php
index c2d8ca2f..73c6f863 100644
--- a/lib/Phpfastcache/Drivers/Solr/Driver.php
+++ b/lib/Phpfastcache/Drivers/Solr/Driver.php
@@ -270,11 +270,18 @@ public function getStats(): DriverStatistic
             }
         }
 
+        $version = 'Unknown version';
+        if (method_exists($this->instance, 'getVersion')) {
+            $version = $this->instance::getVersion();
+        } elseif (defined($this->instance::class . '::VERSION')) {
+            $version = constant($this->instance::class . '::VERSION');
+        }
+
         return (new DriverStatistic())
             ->setData(implode(', ', array_keys($this->itemInstances)))
             ->setInfo(sprintf(
                 'Solarium %s and Solr %s for %s %s. %d document(s) stored in the "%s" core',
-                $this->instance::VERSION,
+                $version,
                 $serverSystemInfo['lucene']['solr-spec-version'] ?? '[unknown SOLR version]',
                 $serverSystemInfo['system']['name'] ?? '[unknown OS]',
                 $serverSystemInfo['system']['version'] ?? '[unknown OS version]',