diff --git a/Makefile b/Makefile
index 02da6d4..2b55809 100644
--- a/Makefile
+++ b/Makefile
@@ -15,7 +15,7 @@
 MAX_THREADS ?= 8 # $(shell nproc)
 MAKE ?= make -j $(shell nproc)
 SLACK ?= slack
-KORAPXMLTOOL_HEAP ?= $(shell echo "$$(($(MAX_THREADS) * 2500))")
+#KORAPXMLTOOL_HEAP ?= $(shell echo "$$(($(MAX_THREADS) * 2500))")
 KORAPXMLTOOL ?= bin/korapxmltool
 MARMOTMALTOOL ?= bin/korapxmltool
 SPACYXMLTOOL ?= bin/korapxmltool