diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index e2d70b316..88d4a4a39 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -10,7 +10,7 @@ dependencies:
 - notebook
 - numpy =1.26.4
 - phonopy =2.22.1
-- plotly =5.19.0
+- plotly =5.21.0
 - pymatgen =2024.4.13
 - pyscal =2.10.18
 - pyxtal =0.6.2
diff --git a/pyproject.toml b/pyproject.toml
index 2b3b8d645..99e955340 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ grainboundary = [
 pyscal = ["pyscal2==2.10.18"]
 nglview = ["nglview==3.1.2"]
 matplotlib = ["matplotlib==3.8.4"]
-plotly = ["plotly==5.19.0"]
+plotly = ["plotly==5.21.0"]
 clusters = ["scikit-learn==1.4.2"]
 symmetry = ["spglib==2.4.0"]
 surface = [