diff --git a/Makefile b/Makefile
index 4c5baad..8e0db74 100644
--- a/Makefile
+++ b/Makefile
@@ -38,7 +38,7 @@
 
 $(BUILD_DIR)/%.zip: $(SRC_DIR)/%.i5.xml
 	mkdir -p $(BUILD_DIR)
-	tei2korapxml --progress -l warn -s -tk $< > $@
+	docker run --rm -i korap/tei2korapxml:latest  -l warn -s -tk - < $< > $@
 	printf "%s\t%s\n" "$(grep -c '<idsText ' $<)" "$(unzip -l $@ | grep data.xml | wc -l)"
 
 
diff --git a/Readme.md b/Readme.md
index 29a48b2..7cf29b9 100644
--- a/Readme.md
+++ b/Readme.md
@@ -12,7 +12,6 @@
 ## Prerequisites
 
 * Java JRE 21 and 
-* [tei2korapxml](https://github.com/KorAP/KorAP-XML-TEI)
 * GNU Make
 * Docker with compose