diff --git a/src/Interfaces/Interfaces.csproj b/src/Interfaces/Interfaces.csproj
index 5483424..9bef5b8 100644
--- a/src/Interfaces/Interfaces.csproj
+++ b/src/Interfaces/Interfaces.csproj
@@ -8,7 +8,7 @@
 
     <ItemGroup>
       <PackageReference Include="Fermentation.Kinetic.Interfaces" Version="2.0.5" />
-      <PackageReference Include="JetBrains.Annotations" Version="2021.3.0" />
+      <PackageReference Include="JetBrains.Annotations" Version="2022.1.0" />
       <PackageReference Include="MathNet.Numerics" Version="4.15.0" />
     </ItemGroup>
 
diff --git a/src/ProcessModel/ProcessModel.csproj b/src/ProcessModel/ProcessModel.csproj
index 0b977d9..bc49f04 100644
--- a/src/ProcessModel/ProcessModel.csproj
+++ b/src/ProcessModel/ProcessModel.csproj
@@ -7,7 +7,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="JetBrains.Annotations" Version="2021.3.0" />
+      <PackageReference Include="JetBrains.Annotations" Version="2022.1.0" />
     </ItemGroup>
 
     <ItemGroup>
diff --git a/src/Variables/Variables.csproj b/src/Variables/Variables.csproj
index a7f765c..76dd31e 100644
--- a/src/Variables/Variables.csproj
+++ b/src/Variables/Variables.csproj
@@ -5,7 +5,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="JetBrains.Annotations" Version="2021.3.0" />
+      <PackageReference Include="JetBrains.Annotations" Version="2022.1.0" />
     </ItemGroup>
 
     <ItemGroup>