diff --git a/modules/joex/src/main/resources/reference.conf b/modules/joex/src/main/resources/reference.conf
index 059e6d05..bd0de234 100644
--- a/modules/joex/src/main/resources/reference.conf
+++ b/modules/joex/src/main/resources/reference.conf
@@ -169,7 +169,7 @@ docspell.joex {
     # below, OCR is run afterwards. Then both extracted texts are
     # compared and the longer will be used.
     pdf {
-      min-text-len = 10
+      min-text-len = 500
     }
 
     # Extracting text using OCR works for image and pdf files. It will