diff --git a/jupyverse_api/jupyverse_api/jupyterlab/__init__.py b/jupyverse_api/jupyverse_api/jupyterlab/__init__.py
index 36f18b56..c9bdf98c 100644
--- a/jupyverse_api/jupyverse_api/jupyterlab/__init__.py
+++ b/jupyverse_api/jupyverse_api/jupyterlab/__init__.py
@@ -89,3 +89,4 @@ async def get_workspace(
 
 class JupyterLabConfig(Config):
     dev_mode: bool = False
+    server_side_execution: bool = False
diff --git a/plugins/jupyterlab/fps_jupyterlab/routes.py b/plugins/jupyterlab/fps_jupyterlab/routes.py
index 50e8b802..6f600d22 100644
--- a/plugins/jupyterlab/fps_jupyterlab/routes.py
+++ b/plugins/jupyterlab/fps_jupyterlab/routes.py
@@ -58,6 +58,7 @@ async def get_lab(
             self.get_index(
                 "default",
                 self.frontend_config.collaborative,
+                self.jupyterlab_config.server_side_execution,
                 self.jupyterlab_config.dev_mode,
                 self.frontend_config.base_url,
             )
@@ -71,6 +72,7 @@ async def load_workspace(
             self.get_index(
                 "default",
                 self.frontend_config.collaborative,
+                self.jupyterlab_config.server_side_execution,
                 self.jupyterlab_config.dev_mode,
                 self.frontend_config.base_url,
             )
@@ -99,11 +101,12 @@ async def get_workspace(
         return self.get_index(
             name,
             self.frontend_config.collaborative,
+            self.jupyterlab_config.server_side_execution,
             self.jupyterlab_config.dev_mode,
             self.frontend_config.base_url,
         )
 
-    def get_index(self, workspace, collaborative, dev_mode, base_url="/"):
+    def get_index(self, workspace, collaborative, server_side_execution, dev_mode, base_url="/"):
         for path in (self.static_lab_dir).glob("main.*.js"):
             main_id = path.name.split(".")[1]
             break
@@ -121,6 +124,7 @@ def get_index(self, workspace, collaborative, dev_mode, base_url="/"):
             "baseUrl": base_url,
             "cacheFiles": False,
             "collaborative": collaborative,
+            "serverSideExecution": server_side_execution,
             "devMode": dev_mode,
             "disabledExtensions": self.disabled_extension,
             "exposeAppInBrowser": False,
diff --git a/plugins/kernels/fps_kernels/kernel_driver/driver.py b/plugins/kernels/fps_kernels/kernel_driver/driver.py
index 5471f2fd..cc65dcc3 100644
--- a/plugins/kernels/fps_kernels/kernel_driver/driver.py
+++ b/plugins/kernels/fps_kernels/kernel_driver/driver.py
@@ -222,18 +222,27 @@ async def _handle_outputs(self, outputs: Array, msg: Dict[str, Any]):
         content = msg["content"]
         if msg_type == "stream":
             with outputs.doc.transaction():
+                # TODO: uncomment when changes are made in jupyter-ydoc
                 if (not outputs) or (outputs[-1]["name"] != content["name"]):  # type: ignore
                     outputs.append(
-                        Map(
-                            {
-                                "name": content["name"],
-                                "output_type": msg_type,
-                                "text": Array([content["text"]]),
-                            }
-                        )
+                        #Map(
+                        #    {
+                        #        "name": content["name"],
+                        #        "output_type": msg_type,
+                        #        "text": Array([content["text"]]),
+                        #    }
+                        #)
+                        {
+                            "name": content["name"],
+                            "output_type": msg_type,
+                            "text": [content["text"]],
+                        }
                     )
                 else:
-                    outputs[-1]["text"].append(content["text"])  # type: ignore
+                    #outputs[-1]["text"].append(content["text"])  # type: ignore
+                    last_output = outputs[-1]
+                    last_output["text"].append(content["text"])  # type: ignore
+                    outputs[-1] = last_output
         elif msg_type in ("display_data", "execute_result"):
             if "application/vnd.jupyter.ywidget-view+json" in content["data"]:
                 # this is a collaborative widget
diff --git a/plugins/yjs/pyproject.toml b/plugins/yjs/pyproject.toml
index e176bd85..a53d3bdc 100644
--- a/plugins/yjs/pyproject.toml
+++ b/plugins/yjs/pyproject.toml
@@ -8,7 +8,7 @@ description = "An FPS plugin for the Yjs API"
 keywords = [ "jupyter", "server", "fastapi", "plugins" ]
 requires-python = ">=3.8"
 dependencies = [
-    "pycrdt >=0.4.2,<0.5.0",
+    "pycrdt >=0.5.0,<0.6.0",
     "jupyverse-api >=0.1.2,<1",
 ]
 dynamic = [ "version",]
diff --git a/pyproject.toml b/pyproject.toml
index 0c84f4c3..94f758e7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,8 +54,8 @@ test = [
     "requests",
     "websockets",
     "ipykernel",
-    "ypywidgets >=0.6.1,<0.7.0",
-    "ypywidgets-textual >=0.2.1,<0.3.0",
+    "ypywidgets >=0.6.3,<0.7.0",
+    "ypywidgets-textual >=0.2.2,<0.3.0",
 ]
 docs = [ "mkdocs", "mkdocs-material" ]