diff --git a/examples/django/requirements.txt b/examples/django/requirements.txt
index 03d2a394a..4e965fb89 100644
--- a/examples/django/requirements.txt
+++ b/examples/django/requirements.txt
@@ -1,2 +1,2 @@
-Django>=3.2,<4
+Django>=3.2,<7
 slack-bolt>=1.7,<2
diff --git a/examples/falcon/requirements.txt b/examples/falcon/requirements.txt
index d72e1e1d0..091fd5c58 100644
--- a/examples/falcon/requirements.txt
+++ b/examples/falcon/requirements.txt
@@ -1,3 +1,3 @@
 falcon>=2,<3
-gunicorn>=20,<21
+gunicorn>=20,<26
 uvicorn
diff --git a/examples/google_app_engine/flask/requirements.txt b/examples/google_app_engine/flask/requirements.txt
index 6b56c96ae..89c40a99f 100644
--- a/examples/google_app_engine/flask/requirements.txt
+++ b/examples/google_app_engine/flask/requirements.txt
@@ -1,2 +1,2 @@
 slack_bolt
-Flask>=1.1,<2
\ No newline at end of file
+Flask>=1.1,<4
\ No newline at end of file
diff --git a/requirements/tools.txt b/requirements/tools.txt
index 73a342ca6..7e05c20f1 100644
--- a/requirements/tools.txt
+++ b/requirements/tools.txt
@@ -1,3 +1,3 @@
 mypy==1.18.2
 flake8==7.3.0
-black==25.1.0
+black==26.3.1