diff --git a/dev-requirements.txt b/dev-requirements.txt
index d61f287d..53eb288e 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -12,8 +12,7 @@ mock
 # nbclassic provides the '/tree/' handler, which we use in tests
 # it is a transitive dependency via jupyterlab,
 # but depend on it directly
-# 0.4 introduces some installation/loading problems (check again after 0.4.3)
-nbclassic<0.4
+nbclassic
 pre-commit
 pytest>=3.3
 pytest-asyncio; python_version < "3.7"