diff --git a/environment.yml b/environment.yml
index 1e51470d43d36..1a7d8662b0e97 100644
--- a/environment.yml
+++ b/environment.yml
@@ -21,7 +21,7 @@ dependencies:
   - flake8<3.8.0  # temporary pin, GH#34150
   - flake8-comprehensions>=3.1.0  # used by flake8, linting of unnecessary comprehensions
   - flake8-rst>=0.6.0,<=0.7.0  # linting of code blocks in rst files
-  - isort>=5.2.1  # check that imports are in the right order
+  - isort>=5.2.1,<5.4.0  # check that imports are in the right order, max pin #35703
   - mypy=0.730
   - pycodestyle  # used by flake8
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 66e72641cd5bb..b2cc049464de2 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -11,7 +11,7 @@ cpplint
 flake8<3.8.0
 flake8-comprehensions>=3.1.0
 flake8-rst>=0.6.0,<=0.7.0
-isort>=5.2.1
+isort>=5.2.1,<5.4.0
 mypy==0.730
 pycodestyle
 gitpython