diff --git a/src/MassBalance/MassBalance.fsproj b/src/MassBalance/MassBalance.fsproj
index e70cede..c85944a 100644
--- a/src/MassBalance/MassBalance.fsproj
+++ b/src/MassBalance/MassBalance.fsproj
@@ -23,7 +23,7 @@
     <ItemGroup>
       <PackageReference Include="Fermentation.Kinetic.Models" Version="2.0.5" />
       <PackageReference Include="MathNet.Numerics.FSharp" Version="4.15.0" />
-      <PackageReference Include="Plotly.NET" Version="2.0.0-preview.6" />
+      <PackageReference Include="Plotly.NET" Version="2.0.0-preview.9" />
       <PackageReference Include="VectorOperations" Version="1.0.0" />
     </ItemGroup>
 
diff --git a/src/Plotting/Plotting.fsproj b/src/Plotting/Plotting.fsproj
index 0f3d5cc..6b26baf 100644
--- a/src/Plotting/Plotting.fsproj
+++ b/src/Plotting/Plotting.fsproj
@@ -11,7 +11,7 @@
     <ItemGroup>
         <Compile Include="PlotFermentation.fs" />
         <PackageReference Include="MathNet.Numerics" Version="4.15.0" />
-        <PackageReference Include="Plotly.NET" Version="2.0.0-preview.6" />
+        <PackageReference Include="Plotly.NET" Version="2.0.0-preview.9" />
     </ItemGroup>
 
 </Project>