diff --git a/quesma/queryparser/query_parser.go b/quesma/queryparser/query_parser.go
index bcd2f01c3..dd14bf668 100644
--- a/quesma/queryparser/query_parser.go
+++ b/quesma/queryparser/query_parser.go
@@ -1262,6 +1262,13 @@ func (cw *ClickhouseQueryTranslator) parseSize(queryMap QueryMap, defaultSize in
 		return defaultSize
 	} else if sizeAsFloat, ok := sizeRaw.(float64); ok {
 		return int(sizeAsFloat)
+	} else if sizeAsString, ok := sizeRaw.(string); ok {
+		if sizeAsInt, err := strconv.Atoi(sizeAsString); err == nil {
+			return sizeAsInt
+		} else {
+			logger.WarnWithCtx(cw.Ctx).Msgf("invalid size type: %T, value: %v. Expected int", sizeRaw, sizeRaw)
+			return defaultSize
+		}
 	} else {
 		logger.WarnWithCtx(cw.Ctx).Msgf("invalid size type: %T, value: %v. Expected float64", sizeRaw, sizeRaw)
 		return defaultSize
diff --git a/quesma/testdata/aggregation_requests.go b/quesma/testdata/aggregation_requests.go
index d2d9f46c2..c8b5e9591 100644
--- a/quesma/testdata/aggregation_requests.go
+++ b/quesma/testdata/aggregation_requests.go
@@ -318,7 +318,7 @@ var AggregationTests = []AggregationTestCase{
 			LIMIT 1001`,
 	},
 	{ // [2]
-		TestName: "date_histogram",
+		TestName: "date_histogram + size as string",
 		QueryRequestJson: `
 		{
 			"_source": {
@@ -345,7 +345,7 @@ var AggregationTests = []AggregationTestCase{
 							"_count": "desc"
 						},
 						"shard_size": 25,
-						"size": 10
+						"size": "10"
 					}
 				}
 			},