diff --git a/examples/employees/app/views.py b/examples/employees/app/views.py
index 6a71cf9505..965e0d22aa 100644
--- a/examples/employees/app/views.py
+++ b/examples/employees/app/views.py
@@ -1,7 +1,7 @@
 from flask_appbuilder import ModelView
 from flask_appbuilder.fieldwidgets import Select2Widget
 from flask_appbuilder.models.sqla.interface import SQLAInterface
-from wtforms.ext.sqlalchemy.fields import QuerySelectField
+from wtforms_sqlalchemy.fields import QuerySelectField
 
 from . import appbuilder, db
 from .models import Benefit, Department, Employee, EmployeeHistory, Function
diff --git a/flask_appbuilder/models/mongoengine/fields.py b/flask_appbuilder/models/mongoengine/fields.py
index bce85f917f..8118bf06a1 100644
--- a/flask_appbuilder/models/mongoengine/fields.py
+++ b/flask_appbuilder/models/mongoengine/fields.py
@@ -34,7 +34,8 @@ def process(self, formdata, data=unset_value):
             if marker in formdata:
                 self._should_delete = True
 
-        return super(MongoFileField, self).process(formdata, data)
+        # return super(MongoFileField, self).process(formdata, data)
+        return super().process(formdata, data)
 
     def populate_obj(self, obj, name):
         field = getattr(obj, name, None)
diff --git a/flask_appbuilder/upload.py b/flask_appbuilder/upload.py
index 37e9377ec7..641dacd816 100644
--- a/flask_appbuilder/upload.py
+++ b/flask_appbuilder/upload.py
@@ -103,12 +103,12 @@ def get_url(self, field):
 
 
 # Fields
-class FileUploadField(fields.TextField):
+class FileUploadField(fields.StringField):
     """
         Customizable file-upload field.
 
         Saves file to configured path, handles updates and deletions.
-        Inherits from `TextField`, resulting filename will be stored as string.
+        Inherits from `StringField`, resulting filename will be stored as string.
     """
 
     widget = BS3FileUploadFieldWidget()
diff --git a/requirements.txt b/requirements.txt
index 3df2b6e9cc..6b8949056b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -109,10 +109,6 @@ werkzeug==1.0.1
     # via
     #   flask
     #   flask-jwt-extended
-wtforms==2.3.3
-    # via
-    #   Flask-AppBuilder (setup.py)
-    #   flask-wtf
 zipp==3.5.0
     # via importlib-metadata
 
diff --git a/setup.py b/setup.py
index f94df8aff5..40ee7d5802 100644
--- a/setup.py
+++ b/setup.py
@@ -66,7 +66,6 @@ def desc():
         # Cautious cap
         "SQLAlchemy<1.5",
         "sqlalchemy-utils>=0.32.21, <1",
-        "WTForms<3.0.0",
     ],
     extras_require={
         "jmespath": ["jmespath>=0.9.5"],