diff --git a/.github/meta.yaml b/.github/meta.yaml
index 7d08b24faa..fbdf33ff3a 100644
--- a/.github/meta.yaml
+++ b/.github/meta.yaml
@@ -78,7 +78,7 @@ outputs:
         - lime >=0.2.0.1
         - python >=3.8.*
         - imbalanced-learn >=0.9.1
-        - sktime >=0.17.0
+        - sktime ==0.17.0
         - pmdarima >=1.8.5
         - vowpalwabbit >=8.11.0
     test:
diff --git a/docs/source/release_notes.rst b/docs/source/release_notes.rst
index e9da3b3080..8bf46b26b1 100644
--- a/docs/source/release_notes.rst
+++ b/docs/source/release_notes.rst
@@ -10,7 +10,9 @@ Release Notes
         * Added calls to ``_handle_nullable_types`` in component fit, transform, and predict methods when needed :pr:`4046`, :pr:`4043`
         * Removed existing nullable type handling across AutoMLSearch to just use new handling :pr:`4085`, :pr:`4043`
         * Handled nullable type incompatibility in ``Decomposer`` :pr:`4105`, :pr:`4043`
+        * Removed nullable type incompatibility handling for ARIMA and ExponentialSmoothingRegressor :pr:`4129`
         * Changed the default value for ``null_strategy`` in ``InvalidTargetDataCheck`` to ``drop`` :pr:`4131`
+        * Pinned sktime version to 0.17.0 for nullable types support :pr:`4137`
     * Documentation Changes
     * Testing Changes
         * Fixed installation of prophet for linux nightly tests :pr:`4114`
diff --git a/pyproject.toml b/pyproject.toml
index 956eb6dbb3..6fefd8fd0a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -58,7 +58,7 @@ dependencies = [
     "category-encoders >= 2.2.2, <= 2.5.1.post0",
     "imbalanced-learn >= 0.9.1",
     "pmdarima >= 1.8.5",
-    "sktime >= 0.17.0",
+    "sktime == 0.17.0",
     "lime >= 0.2.0.1",
     "vowpalwabbit >= 8.11.0",
     "tomli >= 2.0.1",