diff --git a/.gitignore b/.gitignore
index 37b1c60..186abba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 dwm
 dwm.o
+*.o
diff --git a/config.h b/config.h
index 2851077..6bc835d 100644
--- a/config.h
+++ b/config.h
@@ -45,7 +45,8 @@ static const Rule rules[] = {
 	 */
 	/* class      instance    title       tags mask     isfloating   monitor */
 	{ "Gimp",     NULL,       NULL,       0,            1,           -1 },
-	{ "Firefox",  NULL,       NULL,       2,            0,           -1 },
+	{ "firefox",  NULL,       NULL,       2,            0,           -1 },
+	{ "URxvt",    "cal",       NULL,       0,            1,           -1 },
 };
 
 /* layout(s) */
diff --git a/drw.o b/drw.o
deleted file mode 100644
index d90e083..0000000
Binary files a/drw.o and /dev/null differ
diff --git a/util.o b/util.o
deleted file mode 100644
index adcb5c2..0000000
Binary files a/util.o and /dev/null differ