diff --git a/src/Parsers/fuzzers/create_parser_fuzzer.cpp b/src/Parsers/fuzzers/create_parser_fuzzer.cpp
index 032d9ca3ffe..13cb1dfd36e 100644
--- a/src/Parsers/fuzzers/create_parser_fuzzer.cpp
+++ b/src/Parsers/fuzzers/create_parser_fuzzer.cpp
@@ -15,6 +15,12 @@ try
     DB::ParserCreateQuery parser;
     DB::ASTPtr ast = parseQuery(parser, input.data(), input.data() + input.size(), "", 0, 1000);
 
+    const UInt64 max_ast_depth = 1000;
+    ast->checkDepth(max_ast_depth);
+
+    const UInt64 max_ast_elements = 50000;
+    ast->checkSize(max_ast_elements);
+
     DB::WriteBufferFromOwnString wb;
     DB::formatAST(*ast, wb);