diff --git a/changes/noissue.mend.fix.rst b/changes/noissue.mend.fix.rst
new file mode 100644
index 00000000..b984ba8c
--- /dev/null
+++ b/changes/noissue.mend.fix.rst
@@ -0,0 +1 @@
+Fixed Mend issues up to 2026-02-26.
diff --git a/dev-requirements.txt b/dev-requirements.txt
index f05fff05..626215b7 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -134,7 +134,7 @@ ruff>=0.3.5
 #       dependency resolution, so for now we pin notebook to <6.5.
 # TODO: Re-enable for Python 3.13 on Windows once pywin32 install issue is solved, see
 #       https://github.com/mhammond/pywin32/issues/2367
-notebook>=7.2.2; sys_platform != 'win32' or python_version <= '3.12'
+notebook>=7.4.2; sys_platform != 'win32' or python_version <= '3.12'
 jupyter>=1.0.0; sys_platform != 'win32' or python_version <= '3.12'
 jupyter-console>=6.6.3; sys_platform != 'win32' or python_version <= '3.12'
 ipywidgets>=8.0.5; sys_platform != 'win32' or python_version <= '3.12'
@@ -150,7 +150,7 @@ jupyter-core>=5.3.0; sys_platform != 'win32' or python_version <= '3.12'
 ipython-genutils>=0.2.0; sys_platform != 'win32' or python_version <= '3.12'
 ipython>=8.10.0; sys_platform != 'win32' or python_version <= '3.12'
 jupyter-server>=2.14.1; sys_platform != 'win32' or python_version <= '3.12'
-jupyterlab>=4.2.5; sys_platform != 'win32' or python_version <= '3.12'
+jupyterlab>=4.4.8; sys_platform != 'win32' or python_version <= '3.12'
 jupyterlab-server>=2.27.1; sys_platform != 'win32' or python_version <= '3.12'
 notebook-shim>=0.2.3; sys_platform != 'win32' or python_version <= '3.12'
 
@@ -164,7 +164,7 @@ pywin32>=303; sys_platform == 'win32' and python_version <= '3.11'
 pywin32>=306; sys_platform == 'win32' and python_version == '3.12'
 
 # The tornado package is used by ipykernel which is used by jupyter.
-tornado>=6.5
+tornado>=6.5.3
 
 # pyzmq 26.1.0 added wheel archives for Python 3.13
 # pyzmq 27.0.1 added wheel archives for Python 3.14
diff --git a/minimum-constraints-develop.txt b/minimum-constraints-develop.txt
index ed8e0738..48c44037 100644
--- a/minimum-constraints-develop.txt
+++ b/minimum-constraints-develop.txt
@@ -108,7 +108,7 @@ ruff==0.3.5
 # Jupyter Notebook (no imports, invoked via jupyter script):
 # TODO: Re-enable for Python 3.13 on Windows once pywin32 install issue is solved, see
 #       https://github.com/mhammond/pywin32/issues/2367
-notebook==7.2.2; sys_platform != 'win32' or python_version <= '3.12'
+notebook==7.4.2; sys_platform != 'win32' or python_version <= '3.12'
 jupyter==1.0.0; sys_platform != 'win32' or python_version <= '3.12'
 jupyter-console==6.6.3; sys_platform != 'win32' or python_version <= '3.12'
 ipywidgets==8.0.5; sys_platform != 'win32' or python_version <= '3.12'
@@ -124,7 +124,7 @@ jupyter-core==5.3.0; sys_platform != 'win32' or python_version <= '3.12'
 ipython-genutils==0.2.0; sys_platform != 'win32' or python_version <= '3.12'
 ipython==8.10.0; sys_platform != 'win32' or python_version <= '3.12'
 jupyter-server==2.14.1; sys_platform != 'win32' or python_version <= '3.12'
-jupyterlab==4.2.5; sys_platform != 'win32' or python_version <= '3.12'
+jupyterlab==4.4.8; sys_platform != 'win32' or python_version <= '3.12'
 jupyterlab-server==2.27.1; sys_platform != 'win32' or python_version <= '3.12'
 notebook-shim==0.2.3; sys_platform != 'win32' or python_version <= '3.12'
 
@@ -217,7 +217,7 @@ terminado==0.8.3
 testpath==0.3
 toml==0.10.0
 tomli==2.0.1
-tornado==6.5
+tornado==6.5.3
 tqdm==4.66.3
 traitlets==5.6.0
 typing==3.6.1