diff --git a/src/server/gamedata/reader.go b/src/server/gamedata/reader.go
index ec15a45d..1c62982d 100644
--- a/src/server/gamedata/reader.go
+++ b/src/server/gamedata/reader.go
@@ -184,7 +184,7 @@ func GetStringValue(a interface{}, key string) string {
 		if v == nil {
 			return ""
 		}
-		return v.(string)
+		String(v)
 	}
 	return ""
 }
@@ -237,3 +237,22 @@ func Int(a interface{}) int {
 	}
 	return 0
 }
+
+func String(a interface{}) string {
+	if a == nil {
+		return ""
+	}
+	switch v := a.(type) {
+	case int:
+		return strconv.Itoa(v)
+	case int32:
+		return strconv.Itoa(int(v))
+	case int64:
+		return strconv.Itoa(int(v))
+	case float64:
+		return strconv.FormatFloat(v, 'f', -1, 64)
+	case string:
+		return v
+	}
+	return ""
+}