diff --git a/system/src/Settings.php b/system/src/Settings.php
index 6c122237..0749396a 100644
--- a/system/src/Settings.php
+++ b/system/src/Settings.php
@@ -382,6 +382,8 @@ class Settings implements \ArrayAccess
 		}
 
 		$this->settingsDatabase[$pluginKeyName][$key] = $value;
+		// invalidate cache
+		unset($this->cache[$offset]);
 	}
 
 	#[\ReturnTypeWillChange]