diff --git a/pyproject.toml b/pyproject.toml
index 85d7515e9..ac31b558e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,11 +23,11 @@ dependencies = [
     "ipython>=7.23.1",
     "comm>=0.1.1",
     "traitlets>=5.4.0",
-    "jupyter_client>=8.0.0",
-    "jupyter_core>=4.12,!=5.0.*",
+    "jupyter_client>=8.8.0",
+    "jupyter_core>=5.1,!=6.0.*",
     # For tk event loop support only.
     "nest_asyncio>=1.4",
-    "tornado>=6.2",
+    "tornado>=6.4.1",
     "matplotlib-inline>=0.1",
     'appnope>=0.1.2;platform_system=="Darwin"',
     "pyzmq>=25",