diff --git a/server.go b/server.go
index c6987c2..d7af70b 100644
--- a/server.go
+++ b/server.go
@@ -352,8 +352,13 @@ func ConvertInterface(from interface{}, toType reflect.Type) reflect.Value {
 		return convslice
 
 	case reflect.Bool:
-		val, _ := strconv.ParseBool(from.(string))
-		return reflect.ValueOf(val)
+		if fromstr, ok := from.(string); ok {
+			val, _ := strconv.ParseBool(fromstr)
+			return reflect.ValueOf(val)
+		} else if frombool, ok := from.(bool); ok {
+			return reflect.ValueOf(frombool)
+		}
+		return reflect.ValueOf(false)
 
 	case reflect.String:
 		if toType == reflect.TypeOf(primitive.ObjectID{}) {