diff --git a/src/main/java/io/tarantool/driver/core/metadata/ArrayValueToSpaceFormatConverter.java b/src/main/java/io/tarantool/driver/core/metadata/ArrayValueToSpaceFormatConverter.java
index 22c65db8..4baaa632 100644
--- a/src/main/java/io/tarantool/driver/core/metadata/ArrayValueToSpaceFormatConverter.java
+++ b/src/main/java/io/tarantool/driver/core/metadata/ArrayValueToSpaceFormatConverter.java
@@ -43,8 +43,8 @@ public Map<String, TarantoolFieldMetadata> fromValue(ArrayValue format) {
             spaceFormatMetadata.put(
                 fieldMap.get(FORMAT_FIELD_NAME).toString(),
                 new TarantoolFieldMetadataImpl(
-                    fieldMap.get(FORMAT_FIELD_NAME).asStringValue().asString(),
-                    fieldMap.get(FORMAT_FIELD_TYPE).asStringValue().asString(),
+                    fieldMap.get(FORMAT_FIELD_NAME).asStringValue().toString(),
+                    fieldMap.get(FORMAT_FIELD_TYPE).asStringValue().toString(),
                     fieldPosition,
                     isNullable.isPresent() && isNullable.get().asBooleanValue().getBoolean()
                 )
diff --git a/src/main/java/io/tarantool/driver/core/metadata/DDLTarantoolSpaceMetadataConverter.java b/src/main/java/io/tarantool/driver/core/metadata/DDLTarantoolSpaceMetadataConverter.java
index 55282c1d..a8e74404 100644
--- a/src/main/java/io/tarantool/driver/core/metadata/DDLTarantoolSpaceMetadataConverter.java
+++ b/src/main/java/io/tarantool/driver/core/metadata/DDLTarantoolSpaceMetadataConverter.java
@@ -94,7 +94,7 @@ public TarantoolMetadataContainer fromValue(Value value) {
 
             TarantoolSpaceMetadataImpl spaceMetadata = new TarantoolSpaceMetadataImpl();
             spaceMetadata.setOwnerId(ID_UNKNOWN);
-            spaceMetadata.setSpaceName(nameValue.asStringValue().asString());
+            spaceMetadata.setSpaceName(nameValue.asStringValue().toString());
 
             Value formatValue = space.get(SPACE_FORMAT_KEY);
             if (formatValue == null) {
@@ -140,14 +140,14 @@ private Map<String, TarantoolIndexMetadata> parseIndexes(
                 throw new TarantoolClientException(
                     "Unsupported index metadata format: key '" + INDEX_NAME_KEY + "' must have string value");
             }
-            String indexName = indexNameValue.asStringValue().asString();
+            String indexName = indexNameValue.asStringValue().toString();
 
             Value indexTypeValue = indexMap.get(INDEX_TYPE_KEY);
             if (indexTypeValue == null || !indexTypeValue.isStringValue()) {
                 throw new TarantoolClientException(
                     "Unsupported index metadata format: key '" + INDEX_TYPE_KEY + "' must have string value");
             }
-            String indexType = indexTypeValue.asStringValue().asString();
+            String indexType = indexTypeValue.asStringValue().toString();
 
             Value indexUniqueValue = indexMap.get(INDEX_UNIQUE_KEY);
             if (indexUniqueValue == null || !indexUniqueValue.isBooleanValue()) {
@@ -196,7 +196,7 @@ private Map<String, TarantoolIndexMetadata> parseIndexes(
                     int fieldNumber;
                     Object fieldPath;
                     if (fieldPathValue.isStringValue()) {
-                        fieldPath = fieldPathValue.asStringValue().asString();
+                        fieldPath = fieldPathValue.asStringValue().toString();
                         fieldNumber = getFieldNumberFromFieldPath(fields, (String) fieldPath);
                     } else {
                         fieldNumber = fieldPathValue.asIntegerValue().asInt();
@@ -208,7 +208,7 @@ private Map<String, TarantoolIndexMetadata> parseIndexes(
                         throw new TarantoolClientException("Unsupported index metadata format: key '" +
                             INDEX_PARTS_TYPE_KEY + "' must have string value");
                     }
-                    String fieldType = fieldTypeValue.asStringValue().asString();
+                    String fieldType = fieldTypeValue.asStringValue().toString();
 
                     return new TarantoolIndexPartMetadataImpl<>(fieldNumber, fieldType, fieldPath);
                 })
diff --git a/src/main/java/io/tarantool/driver/core/metadata/TarantoolIndexMetadataConverter.java b/src/main/java/io/tarantool/driver/core/metadata/TarantoolIndexMetadataConverter.java
index 1d8371c1..8c52f4fb 100644
--- a/src/main/java/io/tarantool/driver/core/metadata/TarantoolIndexMetadataConverter.java
+++ b/src/main/java/io/tarantool/driver/core/metadata/TarantoolIndexMetadataConverter.java
@@ -61,13 +61,13 @@ public TarantoolIndexMetadata fromValue(ArrayValue value) {
                 indexParts = indexPartsValue.list().stream()
                     .map(partValue -> new TarantoolIndexPartMetadataImpl<>(
                         partValue.asArrayValue().get(0).asIntegerValue().asInt(),
-                        partValue.asArrayValue().get(1).asStringValue().asString()
+                        partValue.asArrayValue().get(1).asStringValue().toString()
                     )).collect(Collectors.toList());
             } else {
                 indexParts = indexPartsValue.list().stream()
                     .map(partValue -> new TarantoolIndexPartMetadataImpl<>(
                         partValue.asMapValue().map().get(INDEX_FIELD_KEY).asIntegerValue().asInt(),
-                        partValue.asMapValue().map().get(INDEX_TYPE_KEY).asStringValue().asString()
+                        partValue.asMapValue().map().get(INDEX_TYPE_KEY).asStringValue().toString()
                     )).collect(Collectors.toList());
             }
         }
diff --git a/src/main/java/io/tarantool/driver/mappers/converters/value/defaults/DefaultStringValueToCharacterConverter.java b/src/main/java/io/tarantool/driver/mappers/converters/value/defaults/DefaultStringValueToCharacterConverter.java
index d98d4302..cff5d8a8 100644
--- a/src/main/java/io/tarantool/driver/mappers/converters/value/defaults/DefaultStringValueToCharacterConverter.java
+++ b/src/main/java/io/tarantool/driver/mappers/converters/value/defaults/DefaultStringValueToCharacterConverter.java
@@ -15,13 +15,13 @@ public class DefaultStringValueToCharacterConverter implements ValueConverter<St
 
     @Override
     public Character fromValue(StringValue value) {
-        String stringFromStringValue = value.asString();
+        String stringFromStringValue = value.toString();
         return stringFromStringValue.charAt(0);
     }
 
     @Override
     public boolean canConvertValue(StringValue value) {
-        String stringFromStringValue = value.asString();
+        String stringFromStringValue = value.toString();
         return stringFromStringValue.length() == 1;
     }
 }
diff --git a/src/main/java/io/tarantool/driver/mappers/converters/value/defaults/DefaultStringValueToStringConverter.java b/src/main/java/io/tarantool/driver/mappers/converters/value/defaults/DefaultStringValueToStringConverter.java
index 5c650198..4503de48 100644
--- a/src/main/java/io/tarantool/driver/mappers/converters/value/defaults/DefaultStringValueToStringConverter.java
+++ b/src/main/java/io/tarantool/driver/mappers/converters/value/defaults/DefaultStringValueToStringConverter.java
@@ -15,6 +15,6 @@ public class DefaultStringValueToStringConverter implements ValueConverter<Strin
 
     @Override
     public String fromValue(StringValue value) {
-        return value.asString();
+        return value.toString();
     }
 }
diff --git a/src/main/java/io/tarantool/driver/package-info.java b/src/main/java/io/tarantool/driver/package-info.java
index 861e7305..edbdc657 100644
--- a/src/main/java/io/tarantool/driver/package-info.java
+++ b/src/main/java/io/tarantool/driver/package-info.java
@@ -39,7 +39,7 @@
  *                     // the default parameters are set to unlimited, though
  *                     new TarantoolSelectOptions(),
  *                     // convert raw MessagePack array to object by hand
- *                     (v) -> new CustomTuple(v.get(0).asIntegerValue().asInt(), v.get(1).asStringValue().asString()))
+ *                     (v) -> new CustomTuple(v.get(0).asIntegerValue().asInt(), v.get(1).asStringValue().toString()))
  *             .get();
  *
  *         customTuples.forEach(