diff --git a/CIfParserTest/CifParserTest.csproj b/CIfParserTest/CifParserTest.csproj
index d0f4b78..992eac0 100644
--- a/CIfParserTest/CifParserTest.csproj
+++ b/CIfParserTest/CifParserTest.csproj
@@ -14,7 +14,7 @@
     <PackageReference Include="FileHelpers" Version="3.5.2" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="NSubstitute" Version="5.1.0" />
-    <PackageReference Include="Serilog" Version="3.1.0" />
+    <PackageReference Include="Serilog" Version="3.1.1" />
     <PackageReference Include="xunit" Version="2.6.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
       <PrivateAssets>all</PrivateAssets>
diff --git a/CifParser/CifParser.csproj b/CifParser/CifParser.csproj
index 0735ebc..02f93d5 100644
--- a/CifParser/CifParser.csproj
+++ b/CifParser/CifParser.csproj
@@ -19,7 +19,7 @@
 
   <ItemGroup>
     <PackageReference Include="FileHelpers" Version="3.5.2" />
-    <PackageReference Include="Serilog" Version="3.1.0" />
+    <PackageReference Include="Serilog" Version="3.1.1" />
   </ItemGroup>
 
 </Project>