diff --git a/Dotenv.php b/Dotenv.php
index a63e5b6..ab177c3 100644
--- a/Dotenv.php
+++ b/Dotenv.php
@@ -463,7 +463,7 @@ private function resolveCommands(string $value, array $loadedVars): string
 
             try {
                 $process->mustRun();
-            } catch (ProcessException $e) {
+            } catch (ProcessException) {
                 throw $this->createFormatException(sprintf('Issue expanding a command (%s)', $process->getErrorOutput()));
             }