diff --git a/src/BBT.StructureTools/BBT.StructureTools.csproj b/src/BBT.StructureTools/BBT.StructureTools.csproj
index 49e92f7..8313941 100644
--- a/src/BBT.StructureTools/BBT.StructureTools.csproj
+++ b/src/BBT.StructureTools/BBT.StructureTools.csproj
@@ -34,7 +34,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="BBT.Maybe" Version="3.1.0" />
+    <PackageReference Include="BBT.Maybe" Version="3.1.1" />
     <PackageReference Include="BBT.StrategyPattern" Version="1.0.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="3.3.1">
       <PrivateAssets>all</PrivateAssets>