diff --git a/dev_tools/requirements/dev.env.txt b/dev_tools/requirements/dev.env.txt
index 6192c12f..cf709814 100644
--- a/dev_tools/requirements/dev.env.txt
+++ b/dev_tools/requirements/dev.env.txt
@@ -140,7 +140,7 @@ pandas==2.0.1
     # via
     #   -r runtime.env.txt
     #   cirq-core
-pillow==9.5.0
+pillow==10.0.1
     # via
     #   -r runtime.env.txt
     #   matplotlib
diff --git a/dev_tools/requirements/format.env.txt b/dev_tools/requirements/format.env.txt
index b9a72af2..0498e438 100644
--- a/dev_tools/requirements/format.env.txt
+++ b/dev_tools/requirements/format.env.txt
@@ -72,7 +72,7 @@ pandas==2.0.1
     # via
     #   -r runtime.env.txt
     #   cirq-core
-pillow==9.5.0
+pillow==10.0.1
     # via
     #   -r runtime.env.txt
     #   matplotlib
diff --git a/dev_tools/requirements/mypy.env.txt b/dev_tools/requirements/mypy.env.txt
index 12a987dd..0e3d7304 100644
--- a/dev_tools/requirements/mypy.env.txt
+++ b/dev_tools/requirements/mypy.env.txt
@@ -76,7 +76,7 @@ pandas==2.0.1
     # via
     #   -r runtime.env.txt
     #   cirq-core
-pillow==9.5.0
+pillow==10.0.1
     # via
     #   -r runtime.env.txt
     #   matplotlib
diff --git a/dev_tools/requirements/pylint.env.txt b/dev_tools/requirements/pylint.env.txt
index ced12d03..8f35d02c 100644
--- a/dev_tools/requirements/pylint.env.txt
+++ b/dev_tools/requirements/pylint.env.txt
@@ -82,7 +82,7 @@ pandas==2.0.1
     # via
     #   -r runtime.env.txt
     #   cirq-core
-pillow==9.5.0
+pillow==10.0.1
     # via
     #   -r runtime.env.txt
     #   matplotlib
diff --git a/dev_tools/requirements/pytest.env.txt b/dev_tools/requirements/pytest.env.txt
index 01c2385b..c841011e 100644
--- a/dev_tools/requirements/pytest.env.txt
+++ b/dev_tools/requirements/pytest.env.txt
@@ -91,7 +91,7 @@ pandas==2.0.1
     # via
     #   -r runtime.env.txt
     #   cirq-core
-pillow==9.5.0
+pillow==10.0.1
     # via
     #   -r runtime.env.txt
     #   matplotlib
diff --git a/dev_tools/requirements/resource_estimates.env.txt b/dev_tools/requirements/resource_estimates.env.txt
index 78c00aa0..0c27d2da 100644
--- a/dev_tools/requirements/resource_estimates.env.txt
+++ b/dev_tools/requirements/resource_estimates.env.txt
@@ -128,7 +128,7 @@ pandas==2.0.1
     # via
     #   -r pytest.env.txt
     #   cirq-core
-pillow==9.5.0
+pillow==10.0.1
     # via
     #   -r pytest.env.txt
     #   matplotlib
diff --git a/dev_tools/requirements/runtime.env.txt b/dev_tools/requirements/runtime.env.txt
index 4807bd9a..ad47cac1 100644
--- a/dev_tools/requirements/runtime.env.txt
+++ b/dev_tools/requirements/runtime.env.txt
@@ -49,7 +49,7 @@ packaging==23.1
     #   matplotlib
 pandas==2.0.1
     # via cirq-core
-pillow==9.5.0
+pillow==10.0.1
     # via matplotlib
 pubchempy==1.0.4
     # via -r deps/runtime.txt