diff --git a/requirements/macos-latest_py3.10_extras.txt b/requirements/macos-latest_py3.10_extras.txt
index 213605eab..978221f75 100644
--- a/requirements/macos-latest_py3.10_extras.txt
+++ b/requirements/macos-latest_py3.10_extras.txt
@@ -360,7 +360,7 @@ pyjwt[crypto]==2.12.1
     #   pyjwt
 pymatgen==2025.10.7
     # via maggma (pyproject.toml)
-pymdown-extensions==10.21.2
+pymdown-extensions==10.21.3
     # via
     #   mkdocs-material
     #   mkdocstrings
diff --git a/requirements/macos-latest_py3.11_extras.txt b/requirements/macos-latest_py3.11_extras.txt
index 80927de90..6b9cf598c 100644
--- a/requirements/macos-latest_py3.11_extras.txt
+++ b/requirements/macos-latest_py3.11_extras.txt
@@ -362,7 +362,7 @@ pymatgen==2026.3.23
     # via maggma (pyproject.toml)
 pymatgen-core==2026.4.16
     # via pymatgen
-pymdown-extensions==10.21.2
+pymdown-extensions==10.21.3
     # via
     #   mkdocs-material
     #   mkdocstrings
diff --git a/requirements/macos-latest_py3.12_extras.txt b/requirements/macos-latest_py3.12_extras.txt
index b131b7605..5dcd00379 100644
--- a/requirements/macos-latest_py3.12_extras.txt
+++ b/requirements/macos-latest_py3.12_extras.txt
@@ -362,7 +362,7 @@ pymatgen==2026.3.23
     # via maggma (pyproject.toml)
 pymatgen-core==2026.4.16
     # via pymatgen
-pymdown-extensions==10.21.2
+pymdown-extensions==10.21.3
     # via
     #   mkdocs-material
     #   mkdocstrings
diff --git a/requirements/macos-latest_py3.9_extras.txt b/requirements/macos-latest_py3.9_extras.txt
index f10d86891..2c7abe9bf 100644
--- a/requirements/macos-latest_py3.9_extras.txt
+++ b/requirements/macos-latest_py3.9_extras.txt
@@ -374,7 +374,7 @@ pyjwt[crypto]==2.12.1
     #   pyjwt
 pymatgen==2024.8.9
     # via maggma (pyproject.toml)
-pymdown-extensions==10.21.2
+pymdown-extensions==10.21.3
     # via
     #   mkdocs-material
     #   mkdocstrings
diff --git a/requirements/ubuntu-latest_py3.10_extras.txt b/requirements/ubuntu-latest_py3.10_extras.txt
index e53085b12..ac821db1d 100644
--- a/requirements/ubuntu-latest_py3.10_extras.txt
+++ b/requirements/ubuntu-latest_py3.10_extras.txt
@@ -360,7 +360,7 @@ pyjwt[crypto]==2.12.1
     #   pyjwt
 pymatgen==2025.10.7
     # via maggma (pyproject.toml)
-pymdown-extensions==10.21.2
+pymdown-extensions==10.21.3
     # via
     #   mkdocs-material
     #   mkdocstrings
diff --git a/requirements/ubuntu-latest_py3.11_extras.txt b/requirements/ubuntu-latest_py3.11_extras.txt
index c6e48c40b..0c727a93a 100644
--- a/requirements/ubuntu-latest_py3.11_extras.txt
+++ b/requirements/ubuntu-latest_py3.11_extras.txt
@@ -362,7 +362,7 @@ pymatgen==2026.3.23
     # via maggma (pyproject.toml)
 pymatgen-core==2026.4.16
     # via pymatgen
-pymdown-extensions==10.21.2
+pymdown-extensions==10.21.3
     # via
     #   mkdocs-material
     #   mkdocstrings
diff --git a/requirements/ubuntu-latest_py3.12_extras.txt b/requirements/ubuntu-latest_py3.12_extras.txt
index 0d90bdd3a..d8a7d6522 100644
--- a/requirements/ubuntu-latest_py3.12_extras.txt
+++ b/requirements/ubuntu-latest_py3.12_extras.txt
@@ -362,7 +362,7 @@ pymatgen==2026.3.23
     # via maggma (pyproject.toml)
 pymatgen-core==2026.4.16
     # via pymatgen
-pymdown-extensions==10.21.2
+pymdown-extensions==10.21.3
     # via
     #   mkdocs-material
     #   mkdocstrings
diff --git a/requirements/ubuntu-latest_py3.9_extras.txt b/requirements/ubuntu-latest_py3.9_extras.txt
index dcc8cfb28..22845f577 100644
--- a/requirements/ubuntu-latest_py3.9_extras.txt
+++ b/requirements/ubuntu-latest_py3.9_extras.txt
@@ -374,7 +374,7 @@ pyjwt[crypto]==2.12.1
     #   pyjwt
 pymatgen==2024.8.9
     # via maggma (pyproject.toml)
-pymdown-extensions==10.21.2
+pymdown-extensions==10.21.3
     # via
     #   mkdocs-material
     #   mkdocstrings