diff --git a/src/invoice2data/input/pdfplumber.py b/src/invoice2data/input/pdfplumber.py
index aa8a472b..8b12c5c8 100644
--- a/src/invoice2data/input/pdfplumber.py
+++ b/src/invoice2data/input/pdfplumber.py
@@ -19,7 +19,8 @@ def to_text(path):
     try:
         import pdfplumber
     except ImportError:
-        logger.debug("Cannot import pdfplumber")
+        logger.error("Cannot import pdfplumber")
+        return "".encode("UTF-8")
 
     raw_text = ""
     raw_text = raw_text.encode(encoding='UTF-8')