diff --git a/liberty b/liberty
index ad5b2fb..75fc6f1 160000
--- a/liberty
+++ b/liberty
@@ -1 +1 @@
-Subproject commit ad5b2fb8cd4915de9c6d97c362839de02d4970a6
+Subproject commit 75fc6f1c374796f9e794297c3893089009b8772f
diff --git a/wmstatus.c b/wmstatus.c
index 5c94378..e7a8654 100644
--- a/wmstatus.c
+++ b/wmstatus.c
@@ -796,7 +796,7 @@ backend_i3_new (void)
 
 // --- Configuration -----------------------------------------------------------
 
-static struct config_schema g_config_general[] =
+static const struct config_schema g_config_general[] =
 {
 	{ .name      = "command",
 	  .comment   = "Command to run for more info",
@@ -807,7 +807,7 @@ static struct config_schema g_config_general[] =
 	{}
 };
 
-static struct config_schema g_config_mpd[] =
+static const struct config_schema g_config_mpd[] =
 {
 	{ .name      = "address",
 	  .comment   = "MPD host or socket",
@@ -823,7 +823,7 @@ static struct config_schema g_config_mpd[] =
 	{}
 };
 
-static struct config_schema g_config_nut[] =
+static const struct config_schema g_config_nut[] =
 {
 	{ .name      = "enabled",
 	  .comment   = "NUT UPS status reading enabled",