diff --git a/Makefile b/Makefile
index e755b886f..c93a2b4bf 100644
--- a/Makefile
+++ b/Makefile
@@ -357,7 +357,7 @@ app: wasm wasmpack shell docs js_tests_release
 	yarn workspace @duckdb/duckdb-wasm-app build:release
 
 build_loadable:
-	USE_GENERATED_EXPORTED_LIST=yes DUCKDB_PLATFORM=wasm_${TARGET} DUCKDB_WASM_LOADABLE_EXTENSIONS=1 GEN=ninja ./scripts/wasm_build_lib.sh relsize ${TARGET}
+	USE_GENERATED_EXPORTED_LIST=yes DUCKDB_PLATFORM=wasm_${TARGET} DUCKDB_WASM_LOADABLE_EXTENSIONS=1 ./scripts/wasm_build_lib.sh relsize ${TARGET}
 
 build_loadable_unsigned: build_loadable
         # need to propagate the unsigned flag
diff --git a/lib/src/config.cc b/lib/src/config.cc
index 4682d86c2..8baed3636 100644
--- a/lib/src/config.cc
+++ b/lib/src/config.cc
@@ -63,7 +63,7 @@ WebDBConfig WebDBConfig::ReadFrom(std::string_view args_json) {
                               .arrow_lossless_conversion = false,
                               .custom_user_agent = ""};
     rapidjson::Document doc;
-    rapidjson::ParseResult ok = doc.Parse(args_json.begin(), args_json.size());
+    rapidjson::ParseResult ok = doc.Parse(args_json.data(), args_json.size());
     if (ok) {
         if (doc.HasMember("path") && doc["path"].IsString()) {
             config.path = doc["path"].GetString();
diff --git a/lib/src/json_parser.cc b/lib/src/json_parser.cc
index 7f54a2705..bed85754e 100644
--- a/lib/src/json_parser.cc
+++ b/lib/src/json_parser.cc
@@ -898,7 +898,7 @@ arrow::Result<std::shared_ptr<arrow::Array>> ArrayFromJSON(const std::shared_ptr
                                                            std::string_view json) {
     rapidjson::Document json_doc;
     try {
-        json_doc.Parse<rapidjson::kParseNanAndInfFlag>(json.begin(), json.size());
+        json_doc.Parse<rapidjson::kParseNanAndInfFlag>(json.data(), json.size());
     } catch (...) {
         return arrow::Status::Invalid("invalid json document: ", json);
     }
diff --git a/lib/src/webdb.cc b/lib/src/webdb.cc
index a4e44de60..626e74678 100644
--- a/lib/src/webdb.cc
+++ b/lib/src/webdb.cc
@@ -354,7 +354,7 @@ arrow::Result<duckdb::unique_ptr<duckdb::QueryResult>> WebDB::Connection::Execut
             return arrow::Status{arrow::StatusCode::KeyError, "No prepared statement found with ID"};
 
         rapidjson::Document args_doc;
-        rapidjson::ParseResult ok = args_doc.Parse(args_json.begin(), args_json.size());
+        rapidjson::ParseResult ok = args_doc.Parse(args_json.data(), args_json.size());
         if (!ok) return arrow::Status{arrow::StatusCode::Invalid, rapidjson::GetParseError_En(ok.Code())};
         if (!args_doc.IsArray()) return arrow::Status{arrow::StatusCode::Invalid, "Arguments must be given as array"};
 
@@ -409,7 +409,7 @@ arrow::Status WebDB::Connection::ClosePreparedStatement(size_t statement_id) {
 arrow::Status WebDB::Connection::CreateScalarFunction(std::string_view def_json) {
     // Read the function definiton
     rapidjson::Document def_doc;
-    def_doc.Parse(def_json.begin(), def_json.size());
+    def_doc.Parse(def_json.data(), def_json.size());
     auto def = duckdb::make_shared_ptr<UDFFunctionDeclaration>();
     ARROW_RETURN_NOT_OK(def->ReadFrom(def_doc));
 
@@ -550,7 +550,7 @@ arrow::Status WebDB::Connection::InsertArrowFromIPCStream(nonstd::span<const uin
             /// We deliberately do this BEFORE creating the ipc stream.
             /// This ensures that we always have valid options.
             rapidjson::Document options_doc;
-            options_doc.Parse(options_json.begin(), options_json.size());
+            options_doc.Parse(options_json.data(), options_json.size());
             ArrowInsertOptions options;
             ARROW_RETURN_NOT_OK(options.ReadFrom(options_doc));
             arrow_insert_options_ = options;
@@ -596,7 +596,7 @@ arrow::Status WebDB::Connection::InsertCSVFromPath(std::string_view path, std::s
     try {
         /// Read table options
         rapidjson::Document options_doc;
-        options_doc.Parse(options_json.begin(), options_json.size());
+        options_doc.Parse(options_json.data(), options_json.size());
         csv::CSVInsertOptions options;
         ARROW_RETURN_NOT_OK(options.ReadFrom(options_doc));
 
@@ -664,7 +664,7 @@ arrow::Status WebDB::Connection::InsertJSONFromPath(std::string_view path, std::
     try {
         /// Read table options
         rapidjson::Document options_doc;
-        options_doc.Parse(options_json.begin(), options_json.size());
+        options_doc.Parse(options_json.data(), options_json.size());
         json::JSONInsertOptions options;
         ARROW_RETURN_NOT_OK(options.ReadFrom(options_doc));