diff --git a/makefile b/makefile
index 4258e48..afc34be 100644
--- a/makefile
+++ b/makefile
@@ -6,13 +6,15 @@ SONG_PDF := $(patsubst %$(SRC_EXTENSION),%.pdf,$(SONG_CHO))
 SONG_HTML := $(patsubst %$(SRC_EXTENSION),%.html,$(SONG_CHO))
 SONGBOOK := songbook.pdf
 
+SHELL := $(shell echo $$SHELL)
+
 .DEFAULT_GOAL := all
 
 %.pdf: %$(SRC_EXTENSION)
-	chordpro --config=chordpro.json -o $@ $<
+	$(SHELL) -c 'chordpro --config=chordpro.json -o $@ $<'
 
 %.html: %$(SRC_EXTENSION)
-	chordpro --config=chordpro.json -o $@ $<
+	$(SHELL)  -c 'chordpro --config=chordpro.json -o $@ $<'
 
 all: $(SONG_PDF) $(SONG_HTML) $(SONGBOOK)