diff --git a/dangerzone/__init__.py b/dangerzone/__init__.py
index f2a9961..f029398 100644
--- a/dangerzone/__init__.py
+++ b/dangerzone/__init__.py
@@ -1,6 +1,19 @@
+import logging
 import os
 import sys
 
+logger = logging.getLogger(__name__)
+
+
+try:
+    from . import vendor  # type: ignore [attr-defined]
+
+    vendor_path: str = vendor.__path__[0]
+    logger.debug(f"Using vendored PyMuPDF libraries from '{vendor_path}'")
+    sys.path.insert(0, vendor_path)
+except ImportError:
+    pass
+
 if "DANGERZONE_MODE" in os.environ:
     mode = os.environ["DANGERZONE_MODE"]
 else: