diff --git a/polyglot/adapter.json b/polyglot/adapter.json
index 7f591ea..fbd453f 100644
--- a/polyglot/adapter.json
+++ b/polyglot/adapter.json
@@ -45,6 +45,16 @@
 					"length": 32704
 				}
 			},
+			{
+				"from": {
+					"type": "varchar",
+					"mode": "char",
+					"hasMaxLength": true
+				},
+				"to": {
+					"length": 255
+				}
+			},
             {
 				"from": {
 					"type": "nvarchar",
@@ -54,6 +64,16 @@
 					"length": 32704
 				}
 			},
+			{
+				"from": {
+					"type": "nvarchar",
+					"mode": "nchar",
+					"hasMaxLength": true
+				},
+				"to": {
+					"length": 255
+				}
+			},
             {
 				"from": {
 					"type": "binary",
diff --git a/polyglot/convertAdapter.json b/polyglot/convertAdapter.json
index 999133d..f590d7a 100644
--- a/polyglot/convertAdapter.json
+++ b/polyglot/convertAdapter.json
@@ -62,7 +62,25 @@
 				"to": {
 					"hasMaxLength": true
 				}
-			}
+			},
+			{
+				"from": {
+					"mode": "char",
+					"length": 255
+				},
+				"to": {
+					"hasMaxLength": true
+				}
+			},
+			{
+				"from": {
+					"mode": "nchar",
+					"length": 255
+				},
+				"to": {
+					"hasMaxLength": true
+				}
+			},
 		]
 	}
 }