diff --git a/environment.yml b/environment.yml
index feea3445cb4fe..136b032e15dbe 100644
--- a/environment.yml
+++ b/environment.yml
@@ -78,6 +78,7 @@ dependencies:
   - bottleneck>=1.2.1
   - ipykernel
   - ipython>=7.11.1
+  - decorator=4  # temporary pin (dependency of IPython), see GH-40768
   - jinja2  # pandas.Styler
   - matplotlib>=2.2.2  # pandas.plotting, Series.plot, DataFrame.plot
   - numexpr>=2.6.8
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 349b176253acb..4d0bdb7f6cb03 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -50,6 +50,7 @@ blosc
 bottleneck>=1.2.1
 ipykernel
 ipython>=7.11.1
+decorator==4
 jinja2
 matplotlib>=2.2.2
 numexpr>=2.6.8