diff --git a/legendary/models/chunk.py b/legendary/models/chunk.py
index 6e9fbd8..7cdd2db 100644
--- a/legendary/models/chunk.py
+++ b/legendary/models/chunk.py
@@ -51,6 +51,8 @@ class Chunk:
 
     @data.setter
     def data(self, value: bytes):
+        if len(value) > 1024*1024:
+            raise ValueError('Provided data is too large (> 1 MiB)!')
         # data is now uncompressed
         if self.compressed:
             self.stored_as ^= 0x1