diff --git a/dev_tools/requirements/envs/dev.env.txt b/dev_tools/requirements/envs/dev.env.txt
index 13aa95ac..2eac8fe4 100644
--- a/dev_tools/requirements/envs/dev.env.txt
+++ b/dev_tools/requirements/envs/dev.env.txt
@@ -45,7 +45,7 @@ execnet==2.1.1
     # via pytest-xdist
 fastjsonschema==2.21.1
     # via nbformat
-fonttools==4.55.8
+fonttools==4.56.0
     # via matplotlib
 h5py==3.12.1
     # via
diff --git a/dev_tools/requirements/envs/format.env.txt b/dev_tools/requirements/envs/format.env.txt
index 864e323d..9e0138df 100644
--- a/dev_tools/requirements/envs/format.env.txt
+++ b/dev_tools/requirements/envs/format.env.txt
@@ -44,7 +44,7 @@ duet==0.2.9
     # via
     #   -c envs/dev.env.txt
     #   cirq-core
-fonttools==4.55.8
+fonttools==4.56.0
     # via
     #   -c envs/dev.env.txt
     #   matplotlib
diff --git a/dev_tools/requirements/envs/mypy.env.txt b/dev_tools/requirements/envs/mypy.env.txt
index a0fcc366..4eefffcf 100644
--- a/dev_tools/requirements/envs/mypy.env.txt
+++ b/dev_tools/requirements/envs/mypy.env.txt
@@ -36,7 +36,7 @@ duet==0.2.9
     # via
     #   -c envs/dev.env.txt
     #   cirq-core
-fonttools==4.55.8
+fonttools==4.56.0
     # via
     #   -c envs/dev.env.txt
     #   matplotlib
diff --git a/dev_tools/requirements/envs/pylint.env.txt b/dev_tools/requirements/envs/pylint.env.txt
index 9be97a23..7287b189 100644
--- a/dev_tools/requirements/envs/pylint.env.txt
+++ b/dev_tools/requirements/envs/pylint.env.txt
@@ -66,7 +66,7 @@ fastjsonschema==2.21.1
     # via
     #   -c envs/dev.env.txt
     #   nbformat
-fonttools==4.55.8
+fonttools==4.56.0
     # via
     #   -c envs/dev.env.txt
     #   matplotlib
diff --git a/dev_tools/requirements/envs/pytest-extra.env.txt b/dev_tools/requirements/envs/pytest-extra.env.txt
index 62b6ed25..fef06e31 100644
--- a/dev_tools/requirements/envs/pytest-extra.env.txt
+++ b/dev_tools/requirements/envs/pytest-extra.env.txt
@@ -58,7 +58,7 @@ fastjsonschema==2.21.1
     # via
     #   -c envs/dev.env.txt
     #   nbformat
-fonttools==4.55.8
+fonttools==4.56.0
     # via
     #   -c envs/dev.env.txt
     #   matplotlib
diff --git a/dev_tools/requirements/envs/pytest.env.txt b/dev_tools/requirements/envs/pytest.env.txt
index 08822a87..313fb8ae 100644
--- a/dev_tools/requirements/envs/pytest.env.txt
+++ b/dev_tools/requirements/envs/pytest.env.txt
@@ -54,7 +54,7 @@ fastjsonschema==2.21.1
     # via
     #   -c envs/dev.env.txt
     #   nbformat
-fonttools==4.55.8
+fonttools==4.56.0
     # via
     #   -c envs/dev.env.txt
     #   matplotlib
diff --git a/dev_tools/requirements/max_compat/dev.env.txt b/dev_tools/requirements/max_compat/dev.env.txt
index 5db5cb21..555f74f7 100644
--- a/dev_tools/requirements/max_compat/dev.env.txt
+++ b/dev_tools/requirements/max_compat/dev.env.txt
@@ -32,7 +32,7 @@ execnet==2.1.1
     # via pytest-xdist
 fastjsonschema==2.21.1
     # via nbformat
-fonttools==4.55.8
+fonttools==4.56.0
     # via matplotlib
 h5py==3.12.1
     # via -r deps/runtime.txt
diff --git a/dev_tools/requirements/max_compat/pytest-max-compat.env.txt b/dev_tools/requirements/max_compat/pytest-max-compat.env.txt
index 68639d37..0cad6d3b 100644
--- a/dev_tools/requirements/max_compat/pytest-max-compat.env.txt
+++ b/dev_tools/requirements/max_compat/pytest-max-compat.env.txt
@@ -54,7 +54,7 @@ fastjsonschema==2.21.1
     # via
     #   -c max_compat/dev.env.txt
     #   nbformat
-fonttools==4.55.8
+fonttools==4.56.0
     # via
     #   -c max_compat/dev.env.txt
     #   matplotlib