diff --git a/noxfile.py b/noxfile.py
index 06cdd7f..6a9620d 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -527,11 +527,11 @@ def _install_packages(session: Session, *packages_or_pip_args: str, **kwargs) ->
 
 
 # TODO (isort): Remove this fix after
-# upgrading to isort ^5.3.0 in pyproject.toml.
+# upgrading to isort ^5.5.4 in pyproject.toml.
 @contextlib.contextmanager
 def _isort_fix(session):
-    """Temporarily upgrade to isort 5.3.0."""
-    session.install('isort==5.3.0')
+    """Temporarily upgrade to isort 5.5.4."""
+    session.install('isort==5.5.4')
     try:
         yield
     finally:
diff --git a/pyproject.toml b/pyproject.toml
index 7752a23..9b5b456 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -59,7 +59,7 @@ pre-commit = "^2.6.0"
 # Code Formatters
 autoflake = "^1.3.1"
 black = "^19.10b0"
-isort = "^4.3.21"  # TODO (isort): not ^5.2.2 due to pylint and wemake-python-styleguide
+isort = "^4.3.21"  # TODO (isort): not ^5.5.4 due to wemake-python-styleguide
 
 # (Static) Code Analyzers
 flake8 = "^3.8.3"