diff --git a/.gitignore b/.gitignore
index eeaa484..43182eb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 # output
 testj1939
-j1939.html
+Readme.html
diff --git a/Makefile b/Makefile
index ee9b43c..06bf09a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,11 +1,11 @@
 
-OUTPUT	= j1939.html testj1939
-default: $(OUTPUT)
+default: testj1939
+all: default j1939.html
 
-%.html: %.page page.theme
+%.html: %.md page.theme
 	theme -f -o $@ $< -p "$*"
 
 CFLAGS	= -Wall -g3 -O0
 
 clean:
-	rm -f $(wildcard *.o) $(OUTPUT)
+	rm -f testj1939 j1939.html
diff --git a/j1939.page b/Readme.md
similarity index 100%
rename from j1939.page
rename to Readme.md