diff --git a/help_docs/method_summary.md b/help_docs/method_summary.md
index a9267810148..9a9cb37d9fc 100644
--- a/help_docs/method_summary.md
+++ b/help_docs/method_summary.md
@@ -161,7 +161,7 @@ self.set_window_position(x, y)
 self.maximize_window()
 self.minimize_window()
 self.reset_window_size()
-self.switch_to_frame(frame="iframe", timeout=None)
+self.switch_to_frame(frame="iframe", timeout=None, invisible=False)
 self.switch_to_default_content()
 self.switch_to_parent_frame()
 with self.frame_switch(frame, timeout=None):
diff --git a/requirements.txt b/requirements.txt
index 3806ba3b716..ebf9051c68a 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ setuptools~=70.2;python_version<"3.10"
 setuptools>=80.9.0;python_version>="3.10"
 wheel>=0.45.1
 attrs>=25.3.0
-certifi>=2025.6.15
+certifi>=2025.7.9
 exceptiongroup>=1.3.0
 websockets~=13.1;python_version<"3.9"
 websockets>=15.0.1;python_version>="3.9"
diff --git a/seleniumbase/__version__.py b/seleniumbase/__version__.py
index 60a75a7ccaf..0afde471397 100755
--- a/seleniumbase/__version__.py
+++ b/seleniumbase/__version__.py
@@ -1,2 +1,2 @@
 # seleniumbase package
-__version__ = "4.40.2"
+__version__ = "4.40.3"
diff --git a/seleniumbase/fixtures/base_case.py b/seleniumbase/fixtures/base_case.py
index 8c8018e4031..d9a44881820 100644
--- a/seleniumbase/fixtures/base_case.py
+++ b/seleniumbase/fixtures/base_case.py
@@ -3591,7 +3591,7 @@ def reset_window_size(self):
         self.set_window_rect(x, y, width, height)
         self.__demo_mode_pause_if_active(tiny=True)
 
-    def switch_to_frame(self, frame="iframe", timeout=None):
+    def switch_to_frame(self, frame="iframe", timeout=None, invisible=False):
         """Wait for an iframe to appear, and switch to it. This should be
         usable as a drop-in replacement for driver.switch_to.frame().
         The iframe identifier can be a selector, an index, an id, a name,
@@ -3599,7 +3599,8 @@ def switch_to_frame(self, frame="iframe", timeout=None):
         for visible iframes with a string selector.
         @Params
         frame - the frame element, name, id, index, or selector
-        timeout - the time to wait for the alert in seconds """
+        timeout - the time to wait for the alert in seconds
+        invisible - if True, the iframe can be invisible """
         self.__check_scope()
         if not timeout:
             timeout = settings.LARGE_TIMEOUT
@@ -3649,7 +3650,9 @@ def switch_to_frame(self, frame="iframe", timeout=None):
             time.sleep(0.035)
             if self.undetectable:
                 time.sleep(0.035)
-        page_actions.switch_to_frame(self.driver, frame, timeout)
+        page_actions.switch_to_frame(
+            self.driver, frame, timeout, invisible=invisible
+        )
         self.wait_for_ready_state_complete()
         if self.__needs_minimum_wait():
             time.sleep(0.015)
diff --git a/seleniumbase/fixtures/page_actions.py b/seleniumbase/fixtures/page_actions.py
index ac84428d9be..66b0bf554dc 100644
--- a/seleniumbase/fixtures/page_actions.py
+++ b/seleniumbase/fixtures/page_actions.py
@@ -1572,7 +1572,9 @@ def wait_for_and_switch_to_alert(driver, timeout=settings.LARGE_TIMEOUT):
     timeout_exception(Exception, message)
 
 
-def switch_to_frame(driver, frame, timeout=settings.SMALL_TIMEOUT):
+def switch_to_frame(
+    driver, frame, timeout=settings.SMALL_TIMEOUT, invisible=False
+):
     """
     Wait for an iframe to appear, and switch to it. This should be
     usable as a drop-in replacement for driver.switch_to.frame().
@@ -1580,6 +1582,7 @@ def switch_to_frame(driver, frame, timeout=settings.SMALL_TIMEOUT):
     driver - the webdriver object (required)
     frame - the frame element, name, id, index, or selector
     timeout - the time to wait for the alert in seconds
+    invisible - if True, the iframe can be invisible
     """
     _reconnect_if_disconnected(driver)
     start_ms = time.time() * 1000.0
@@ -1596,7 +1599,10 @@ def switch_to_frame(driver, frame, timeout=settings.SMALL_TIMEOUT):
                     by = "xpath"
                 else:
                     by = "css selector"
-                if is_element_visible(driver, frame, by=by):
+                if (
+                    is_element_visible(driver, frame, by=by)
+                    or (invisible and is_element_present(driver, frame, by=by))
+                ):
                     with suppress(Exception):
                         element = driver.find_element(by=by, value=frame)
                         driver.switch_to.frame(element)
@@ -1608,8 +1614,12 @@ def switch_to_frame(driver, frame, timeout=settings.SMALL_TIMEOUT):
     plural = "s"
     if timeout == 1:
         plural = ""
-    message = "Frame {%s} was not visible after %s second%s!" % (
+    presence = "visible"
+    if invisible:
+        presence = "present"
+    message = "Frame {%s} was not %s after %s second%s!" % (
         frame,
+        presence,
         timeout,
         plural,
     )
diff --git a/setup.py b/setup.py
index a7279207bf0..27339fbcb52 100755
--- a/setup.py
+++ b/setup.py
@@ -153,7 +153,7 @@
         'setuptools>=80.9.0;python_version>="3.10"',
         'wheel>=0.45.1',
         'attrs>=25.3.0',
-        "certifi>=2025.6.15",
+        "certifi>=2025.7.9",
         "exceptiongroup>=1.3.0",
         'websockets~=13.1;python_version<"3.9"',
         'websockets>=15.0.1;python_version>="3.9"',