diff --git a/requirements-healpy.txt b/requirements-healpy.txt
index 5710dc671..fa4ae3fad 100644
--- a/requirements-healpy.txt
+++ b/requirements-healpy.txt
@@ -8,7 +8,7 @@ charset-normalizer==3.5.1 ; python_version >= "3.11" and python_version < "3.15"
 colorama==0.4.6 ; python_version >= "3.11" and python_version < "3.15" and platform_system == "Windows"
 contourpy==1.3.3 ; python_version >= "3.11" and python_version < "3.15"
 cycler==0.12.1 ; python_version >= "3.11" and python_version < "3.15"
-fonttools==4.63.0 ; python_version >= "3.11" and python_version < "3.15"
+fonttools==4.64.0 ; python_version >= "3.11" and python_version < "3.15"
 healpy==1.20.0 ; python_version >= "3.11" and python_version < "3.15"
 idna==3.19 ; python_version >= "3.11" and python_version < "3.15"
 kiwisolver==1.5.1 ; python_version >= "3.11" and python_version < "3.15"
diff --git a/requirements-jax.txt b/requirements-jax.txt
index 0693b76d3..19bbe37bd 100644
--- a/requirements-jax.txt
+++ b/requirements-jax.txt
@@ -9,7 +9,7 @@ charset-normalizer==3.5.1 ; python_version >= "3.11" and python_version < "3.15"
 colorama==0.4.6 ; python_version >= "3.11" and python_version < "3.15" and platform_system == "Windows"
 contourpy==1.3.3 ; python_version >= "3.11" and python_version < "3.15"
 cycler==0.12.1 ; python_version >= "3.11" and python_version < "3.15"
-fonttools==4.63.0 ; python_version >= "3.11" and python_version < "3.15"
+fonttools==4.64.0 ; python_version >= "3.11" and python_version < "3.15"
 idna==3.19 ; python_version >= "3.11" and python_version < "3.15"
 jax==0.10.2 ; python_version >= "3.11" and python_version < "3.15"
 jaxlib==0.10.2 ; python_version >= "3.11" and python_version < "3.15"
diff --git a/requirements-pytorch.txt b/requirements-pytorch.txt
index 24a4f0885..8d729e1ed 100644
--- a/requirements-pytorch.txt
+++ b/requirements-pytorch.txt
@@ -12,7 +12,7 @@ cuda-pathfinder==1.5.4 ; python_version >= "3.11" and python_version < "3.15" an
 cuda-toolkit==13.0.2 ; python_version >= "3.11" and python_version < "3.15" and platform_system == "Linux"
 cycler==0.12.1 ; python_version >= "3.11" and python_version < "3.15"
 filelock==3.32.4 ; python_version >= "3.11" and python_version < "3.15"
-fonttools==4.63.0 ; python_version >= "3.11" and python_version < "3.15"
+fonttools==4.64.0 ; python_version >= "3.11" and python_version < "3.15"
 fsspec==2026.7.0 ; python_version >= "3.11" and python_version < "3.15"
 idna==3.19 ; python_version >= "3.11" and python_version < "3.15"
 jinja2==3.1.6 ; python_version >= "3.11" and python_version < "3.15"