diff --git a/config.def.h b/config.def.h
index d6d8a5c..86e19a8 100644
--- a/config.def.h
+++ b/config.def.h
@@ -38,7 +38,7 @@ static const Rule rules[] = {
 	{ "vesktop",  NULL,       NULL,       1 << 1,       0,            1 },
 	{ "calendar", NULL,       NULL,       1 << 4,       0,            1 },
 	{ "mail",     NULL,       NULL,       1 << 5,       0,            1 },
-	{ "Obsidian", NULL,       NULL,       1 << 3,       0,            1 },
+	{ "obsidian", NULL,       NULL,       1 << 3,       0,            1 },
 	{ "nannou",   NULL,       NULL,       0,            1,           -1 },
 };