diff --git a/src/Mike42/Escpos/resources/capabilities.json b/src/Mike42/Escpos/resources/capabilities.json
index 6edc7d56..89841456 100644
--- a/src/Mike42/Escpos/resources/capabilities.json
+++ b/src/Mike42/Escpos/resources/capabilities.json
@@ -576,10 +576,10 @@
                 "6": "Unknown",
                 "7": "Unknown",
                 "8": "Unknown",
-                "9": "Unknown",
+                "9": "CP866",
                 "10": "Unknown",
                 "16": "CP1252",
-                "17": "CP866",
+                "17": "CP1251",
                 "18": "CP852",
                 "19": "CP858",
                 "20": "Unknown",