diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index a98d3d1..e9453f9 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -30,7 +30,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v7
         with:
-          python-version: 3.14
+          python-version: 3.15
 
       - name: Install detect-secrets
         run: |
@@ -102,7 +102,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v7
         with:
-          python-version: 3.14
+          python-version: 3.15
 
       - name: Install Publishing Tools
         run: |
diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index 62958c9..969ac82 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -28,7 +28,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v7
         with:
-          python-version: 3.14
+          python-version: 3.15
 
       - name: Build and publish distribution
         env:
diff --git a/pyproject.toml b/pyproject.toml
index 519efb6..0826d79 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ keywords=["ibm", "cloud", "ibm cloud services"]
 dependencies = [
     "requests>=2.32.4,<3.0.0",
     "urllib3>=2.4.0,<3.0.0",
-    "python_dateutil>=2.9.0,<3.0.0",
+    "python_dateutil>=3.0.0,<3.1.0",
     "PyJWT>=2.11.0,<3.0.0",
 ]