diff --git a/android/pyproject.toml b/android/pyproject.toml
index 9f839945a2..b24e87be7e 100644
--- a/android/pyproject.toml
+++ b/android/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "setuptools==74.1.2",
+    "setuptools==75.0.0",
     "setuptools_scm==8.1.0",
     "setuptools_dynamic_dependencies @ git+https://github.com/beeware/setuptools_dynamic_dependencies",
 ]
diff --git a/changes/2846.misc.rst b/changes/2846.misc.rst
new file mode 100644
index 0000000000..08cd276c7e
--- /dev/null
+++ b/changes/2846.misc.rst
@@ -0,0 +1 @@
+The pinned dependencies in pyproject.toml and tox.ini were updated to their latest versions.
diff --git a/cocoa/pyproject.toml b/cocoa/pyproject.toml
index 372757ff2c..8eb0a6b188 100644
--- a/cocoa/pyproject.toml
+++ b/cocoa/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "setuptools==74.1.2",
+    "setuptools==75.0.0",
     "setuptools_scm==8.1.0",
     "setuptools_dynamic_dependencies @ git+https://github.com/beeware/setuptools_dynamic_dependencies",
 ]
diff --git a/core/pyproject.toml b/core/pyproject.toml
index 9401869c5d..1d1c7c748b 100644
--- a/core/pyproject.toml
+++ b/core/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "setuptools==74.1.2",
+    "setuptools==75.0.0",
     "setuptools_scm==8.1.0",
     "setuptools_dynamic_dependencies @ git+https://github.com/beeware/setuptools_dynamic_dependencies",
 ]
diff --git a/demo/pyproject.toml b/demo/pyproject.toml
index 5b460391c7..120ae51bbc 100644
--- a/demo/pyproject.toml
+++ b/demo/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "setuptools==74.1.2",
+    "setuptools==75.0.0",
     "setuptools_scm==8.1.0",
     "setuptools_dynamic_dependencies @ git+https://github.com/beeware/setuptools_dynamic_dependencies",
 ]
diff --git a/dummy/pyproject.toml b/dummy/pyproject.toml
index 4c28936aae..ae1f9546ea 100644
--- a/dummy/pyproject.toml
+++ b/dummy/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "setuptools==74.1.2",
+    "setuptools==75.0.0",
     "setuptools_scm==8.1.0",
     "setuptools_dynamic_dependencies @ git+https://github.com/beeware/setuptools_dynamic_dependencies",
 ]
diff --git a/gtk/pyproject.toml b/gtk/pyproject.toml
index 7193aae47a..eb674ac8c7 100644
--- a/gtk/pyproject.toml
+++ b/gtk/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "setuptools==74.1.2",
+    "setuptools==75.0.0",
     "setuptools_scm==8.1.0",
     "setuptools_dynamic_dependencies @ git+https://github.com/beeware/setuptools_dynamic_dependencies",
 ]
diff --git a/iOS/pyproject.toml b/iOS/pyproject.toml
index 085df6525d..8d1e83032d 100644
--- a/iOS/pyproject.toml
+++ b/iOS/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "setuptools==74.1.2",
+    "setuptools==75.0.0",
     "setuptools_scm==8.1.0",
     "setuptools_dynamic_dependencies @ git+https://github.com/beeware/setuptools_dynamic_dependencies",
 ]
diff --git a/textual/pyproject.toml b/textual/pyproject.toml
index afe29c5f6c..2fb27f75a8 100644
--- a/textual/pyproject.toml
+++ b/textual/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "setuptools==74.1.2",
+    "setuptools==75.0.0",
     "setuptools_scm==8.1.0",
     "setuptools_dynamic_dependencies @ git+https://github.com/beeware/setuptools_dynamic_dependencies",
 ]
diff --git a/toga/pyproject.toml b/toga/pyproject.toml
index f61695f997..3497ff1eb0 100644
--- a/toga/pyproject.toml
+++ b/toga/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "setuptools==74.1.2",
+    "setuptools==75.0.0",
     "setuptools_scm==8.1.0",
     "setuptools_dynamic_dependencies @ git+https://github.com/beeware/setuptools_dynamic_dependencies",
 ]
diff --git a/web/pyproject.toml b/web/pyproject.toml
index 4f23b071f7..cea997779e 100644
--- a/web/pyproject.toml
+++ b/web/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "setuptools==74.1.2",
+    "setuptools==75.0.0",
     "setuptools_scm==8.1.0",
     "setuptools_dynamic_dependencies @ git+https://github.com/beeware/setuptools_dynamic_dependencies",
 ]
diff --git a/winforms/pyproject.toml b/winforms/pyproject.toml
index 8ca6cadf6d..faaf00d3ca 100644
--- a/winforms/pyproject.toml
+++ b/winforms/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "setuptools==74.1.2",
+    "setuptools==75.0.0",
     "setuptools_scm==8.1.0",
     "setuptools_dynamic_dependencies @ git+https://github.com/beeware/setuptools_dynamic_dependencies",
 ]