diff --git a/gemd/__version__.py b/gemd/__version__.py
index 131942e..ce1305b 100644
--- a/gemd/__version__.py
+++ b/gemd/__version__.py
@@ -1 +1 @@
-__version__ = "3.0.2"
+__version__ = "4.0.0"
diff --git a/gemd/demo/cake.py b/gemd/demo/cake.py
index fe4b0cb..80b57a1 100644
--- a/gemd/demo/cake.py
+++ b/gemd/demo/cake.py
@@ -195,12 +195,10 @@ def make_cake_templates():
     tmpl["Procuring"] = ProcessTemplate(
         name="Procuring",
         description="Buyin' stuff",
-        allowed_names=[],  # Takes no ingredients by definition
     )
     tmpl["Baking"] = ProcessTemplate(
         name="Baking",
         description="Using heat to promote chemical reactions in a material",
-        allowed_names=["batter"],
         allowed_labels=["precursor"],
         conditions=[(tmpl["Oven temperature"], RealBounds(0, 700, "degF"))],
         parameters=[(tmpl["Oven temperature setting"], RealBounds(100, 550, "degF"))],
diff --git a/gemd/entity/template/process_template.py b/gemd/entity/template/process_template.py
index 443f406..ce01489 100644
--- a/gemd/entity/template/process_template.py
+++ b/gemd/entity/template/process_template.py
@@ -31,12 +31,6 @@ class ProcessTemplate(
         `Tags <https://citrineinformatics.github.io/gemd-documentation/specification/tags/>`_
         are hierarchical strings that store information about an entity. They can be used
         for filtering and discoverability.
-    allowed_names: List[str], optional
-        Deprecated. This field does not limit ingredient names.
-        The Citrine Platform ignores this list when you save a template. When you fetch a
-        template, this list has the distinct ingredient names from process specs that use
-        the template. Names come from datasets you can read. GEMD Python keeps this field
-        to give users time to migrate code and JSON away from it.
     allowed_labels: List[str], optional
         The set of labels that a process' ingredients are allowed to use in their labels field.
     conditions: List[~gemd.entity.template.condition_template.ConditionTemplate] or \
@@ -61,7 +55,6 @@ def __init__(
         description=None,
         conditions=None,
         parameters=None,
-        allowed_names=None,
         allowed_labels=None,
         uids=None,
         tags=None,
@@ -70,24 +63,9 @@ def __init__(
         HasConditionTemplates.__init__(self, conditions)
         HasParameterTemplates.__init__(self, parameters)
 
-        self._allowed_names = None
-        self.allowed_names = allowed_names
-
         self._allowed_labels = None
         self.allowed_labels = allowed_labels
 
-    @property
-    def allowed_names(self):
-        """Get the allowed names."""
-        return self._allowed_names
-
-    @allowed_names.setter
-    def allowed_names(self, allowed_names):
-        if allowed_names is None:
-            self._allowed_names = validate_list([], str)
-        else:
-            self._allowed_names = validate_list(allowed_names, str)
-
     @property
     def allowed_labels(self):
         """Get the allowed labels."""
diff --git a/tests/entity/template/test_process_template.py b/tests/entity/template/test_process_template.py
index e3f8d39..f6891b8 100644
--- a/tests/entity/template/test_process_template.py
+++ b/tests/entity/template/test_process_template.py
@@ -19,18 +19,6 @@ def test_bounds_mismatch():
         ProcessTemplate("a process template", conditions=[[cond_template, object_bounds]])
 
 
-def test_allowed_names():
-    """Test that allowed_names can be assigned.
-
-    Presently allowed_names is not used for any validation, but this test can be expanded
-    if it is used in the future.
-    """
-    allowed_names = ["THF", "Carbon Disulfide", "Dimethyl Ether"]
-    proc_template = ProcessTemplate(name="test template", allowed_names=allowed_names)
-    for name in allowed_names:
-        assert name in proc_template.allowed_names
-
-
 def test_allowed_labels():
     """Test that allowed_labels can be assigned.