diff --git a/.gitignore b/.gitignore
index 4d24b44..1369984 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,2 @@
-/Makefile.csm
+/makefile.csm
 /rain
diff --git a/Makefile b/makefile
similarity index 67%
rename from Makefile
rename to makefile
index 12c0eec..738144f 100644
--- a/Makefile
+++ b/makefile
@@ -3,11 +3,11 @@ PREFIX := /usr/local
 INSTALL := install
 
 .PHONY: all
-all: Makefile.csm
-	$(MAKE) -f Makefile.csm
+all: makefile.csm
+	$(MAKE) -f makefile.csm
 
-Makefile.csm:
-	$(CSM) -makefile Makefile.csm
+makefile.csm:
+	$(CSM) -makefile makefile.csm
 
 .PHONY: clean
 clean: