diff --git a/src/pmf/Level.php b/src/pmf/Level.php
index 2da3554dc..de444d5d3 100644
--- a/src/pmf/Level.php
+++ b/src/pmf/Level.php
@@ -106,6 +106,9 @@ class PMFLevel extends PMF{
 		}
 		$this->seek(5);
 		$this->levelData["version"] = ord($this->read(1));
+		if($this->levelData["version"] > PMF_CURRENT_LEVEL_VERSION){
+			return false;
+		}
 		$this->levelData["name"] = $this->read(Utils::readShort($this->read(2), false));
 		$this->levelData["seed"] = Utils::readInt($this->read(4));
 		$this->levelData["time"] = Utils::readInt($this->read(4));
diff --git a/src/pmf/Plugin.php b/src/pmf/Plugin.php
index d433a9209..7b9592b30 100644
--- a/src/pmf/Plugin.php
+++ b/src/pmf/Plugin.php
@@ -49,6 +49,9 @@ class PMFPlugin extends PMF{
 		}
 		$this->seek(5);
 		$this->pluginData["fversion"] = ord($this->read(1));
+		if($this->pluginData["fversion"] > PMF_CURRENT_PLUGIN_VERSION){
+			return false;
+		}
 		$this->pluginData["name"] = $this->read(Utils::readShort($this->read(2), false));
 		$this->pluginData["version"] = $this->read(Utils::readShort($this->read(2), false));
 		$this->pluginData["author"] = $this->read(Utils::readShort($this->read(2), false));