diff --git a/sdk/src/Makefile b/sdk/src/Makefile
index 6cdabdd..6c8cf29 100644
--- a/sdk/src/Makefile
+++ b/sdk/src/Makefile
@@ -26,7 +26,13 @@ sjasmplus/build/$(SJASMPLUS): | sjasmplus sjasmplus.mk
 	$(MAKE) -w -C sjasmplus -f ../sjasmplus.mk
 
 sjasmplus:
-	git clone https://github.com/sjasmplus/sjasmplus.git $@
+	wget -c https://github.com/sjasmplus/sjasmplus/archive/refs/tags/20190306.1.tar.gz -O sjasmplus.tgz
+	echo 'f3f6d28af19880ed2cb427b6b427e9bd42371929c7d263dac840fb71de1302d6  sjasmplus.tgz' >sjasmplus.sha256sum
+	sha256sum -c sjasmplus.sha256sum
+	rm -f sjasmplus.sha256sum
+	tar -xzf sjasmplus.tgz
+	mv sjasmplus-20190306.1 sjasmplus
+	rm -f sjasmplus.tgz
 endif
 
 .PHONY: clean