diff --git a/.ci_support/environment-docs.yml b/.ci_support/environment-docs.yml
index 9f9129b3c..5c0558a59 100644
--- a/.ci_support/environment-docs.yml
+++ b/.ci_support/environment-docs.yml
@@ -10,7 +10,7 @@ dependencies:
 - atomistics =0.1.32
 - defusedxml =0.7.1
 - h5py =3.12.1
-- matplotlib-base =3.9.3
+- matplotlib-base =3.9.4
 - mendeleev =0.19.0
 - mp-api =0.43.0
 - numpy =1.26.4
diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index 407f659b7..10df51e67 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -8,7 +8,7 @@ dependencies:
 - codacy-coverage
 - defusedxml =0.7.1
 - h5py =3.12.1
-- matplotlib-base =3.9.3
+- matplotlib-base =3.9.4
 - mendeleev =0.19.0
 - mp-api =0.43.0
 - numpy =1.26.4
diff --git a/binder/environment.yml b/binder/environment.yml
index 3392d6961..0b9648d1c 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -6,7 +6,7 @@ dependencies:
 - atomistics =0.1.32
 - defusedxml =0.7.1
 - h5py =3.12.1
-- matplotlib-base =3.9.3
+- matplotlib-base =3.9.4
 - mendeleev =0.19.0
 - mp-api =0.43.0
 - numpy =1.26.4
diff --git a/pyproject.toml b/pyproject.toml
index bd561b046..c1f59688e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ dependencies = [
     "atomistics==0.1.32",
     "defusedxml==0.7.1",
     "h5py==3.12.1",
-    "matplotlib==3.9.3",
+    "matplotlib==3.9.4",
     "mendeleev==0.19.0",
     "mp-api==0.43.0",
     "numpy==1.26.4",