diff --git a/soitool/serialize_export_import_soi.py b/soitool/serialize_export_import_soi.py
index 2c10055a33fabc6d2176af352502b8ea9a8cc710..294c713e54bd19dc956638f28c05cc103c6550ab 100644
--- a/soitool/serialize_export_import_soi.py
+++ b/soitool/serialize_export_import_soi.py
@@ -15,7 +15,17 @@ SERIALIZED_SOI_SCHEMA = Schema(
         "date": Or(str, None),
         "valid": {"from_date": Or(str, None), "to_date": Or(str, None)},
         "icon": Or(str, None),
-        "classification": And(str, len),
+        "classification": And(
+            str,
+            len,
+            Or(
+                "UGRADERT",
+                "BEGRENSET",
+                "KONFIDENSIELT",
+                "HEMMELIG",
+                "STRENGT HEMMELIG",
+            ),
+        ),
         "orientation": And(str, len, Or("portrait", "landscape")),
         "placement_strategy": And(str, len, Or("manual", "auto")),
         "algorithm_bin": And(str, len, Or("BFF", "BBF")),
diff --git a/test/test_serialize_export_import.py b/test/test_serialize_export_import.py
index eec9f433bb50901672a06e93f5e93fa677e3742f..d615e6c491e10cf710d06260b16892dd06c16ec0 100644
--- a/test/test_serialize_export_import.py
+++ b/test/test_serialize_export_import.py
@@ -28,7 +28,7 @@ DATE = "01.01.2020"
 VALID_FROM = "01.01.2020"
 VALID_TO = "02.01.2020"
 ICON = "soitool/media/HVlogo.png"
-CLASSIFICATION = "Ugradert"
+CLASSIFICATION = "UGRADERT"
 ORIENTATION = "portrait"
 PLACEMENT_STRATEGY = "manual"
 ALGORITHM_BIN = "BFF"