diff --git a/resources/profiles/Creality/machine/Creality K1 0.4 nozzle.json b/resources/profiles/Creality/machine/Creality K1 0.4 nozzle.json
index c7df2b88..cad7a6c4 100644
--- a/resources/profiles/Creality/machine/Creality K1 0.4 nozzle.json	
+++ b/resources/profiles/Creality/machine/Creality K1 0.4 nozzle.json	
@@ -79,7 +79,7 @@
     "support_chamber_temp_control": "0",
     "support_multi_bed_types": "1",
     "thumbnails": "96x96,300x300",
-    "thumbnails_format": "PNG",
+    "thumbnails_format": "CR_PNG",
     "time_cost": "0",
     "use_firmware_retraction": "0",
     "use_relative_e_distances": "1",
@@ -112,4 +112,4 @@
     "z_hop_types": "Auto Lift",
     "name": "Creality K1 0.4 nozzle",
     "setting_id": "54431"
-}
\ No newline at end of file
+}