diff --git a/docs/requirements.txt b/docs/requirements.txt
index d33044a..9f76d1f 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -2,7 +2,7 @@ email_validator==2.0.0.post2
 pydantic==1.10.8
 simpleeval==0.9.13
 Sphinx==7.0.1
-Click==8.1.3
+Click==8.1.5
 sphinx-autodoc-typehints==1.23.4
 sphinxcontrib.spelling==5.4.0
 sphinxcontrib.apidoc==0.3.0
diff --git a/questions/form.py b/questions/form.py
index e48e805..4f8ef6c 100644
--- a/questions/form.py
+++ b/questions/form.py
@@ -256,7 +256,13 @@ def _add_elements(self, survey, form, top_level=False, container_name="questions
                     self._add_elements(page, element.form)
                     survey.pages.append(page)
                 elif isinstance(element, (FormPage, FormPanel)):
-                    container = getattr(survey, container_name)
+                    container = getattr(survey, container_name, None)
+                    if container is None:
+                        pages = survey.pages
+                        if len(pages) > 0:
+                            container = getattr(pages[0], container_name)
+                    if container is None:
+                        raise "Error in form definition: container not found."
                     if element.dynamic:
                         panel = PanelDynamicBlock(name=name, **element.params)
                         new_container_name = "template_elements"
diff --git a/requirements.txt b/requirements.txt
index fdfc4da..3194682 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 email_validator==2.0.0.post2
 Jinja2==3.1.2
-pydantic==1.10.8
+pydantic==1.10.11
 requests==2.31.0
 simpleeval==0.9.13
-typing-extensions==4.5.0;python_version<"3.8"
+typing-extensions==4.8.0;python_version<"3.8"
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 3ec068e..939e5d8 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,10 +4,10 @@ wheel==0.40.0
 watchdog==3.0.0
 flake8==6.0.0
 tox==4.11.3
-coverage==7.2.5
+coverage==7.3.1
 Sphinx==7.0.1
 twine==4.0.2
-Click==8.1.3
+Click==8.1.5
 pytest==7.3.1
 black==23.3.0
 sphinx-autodoc-napoleon-typehints==2.1.6
diff --git a/setup.py b/setup.py
index 476464e..a713883 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@
     "Click>=7.0",
     "email_validator",
     "Jinja2",
-    "pydantic",
+    "pydantic==1.10.11",
     "requests",
     "simpleeval",
 ]