diff --git a/MaxMind.Db.Benchmark/MaxMind.Db.Benchmark.csproj b/MaxMind.Db.Benchmark/MaxMind.Db.Benchmark.csproj
index 35d6519..f66845b 100644
--- a/MaxMind.Db.Benchmark/MaxMind.Db.Benchmark.csproj
+++ b/MaxMind.Db.Benchmark/MaxMind.Db.Benchmark.csproj
@@ -23,6 +23,7 @@
     <AnalysisLevel>latest</AnalysisLevel>
     <EnableNETAnalyzers>true</EnableNETAnalyzers>
     <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|net45|AnyCPU'">
diff --git a/MaxMind.Db.Test/MaxMind.Db.Test.csproj b/MaxMind.Db.Test/MaxMind.Db.Test.csproj
index 8acfe7d..4cc0897 100644
--- a/MaxMind.Db.Test/MaxMind.Db.Test.csproj
+++ b/MaxMind.Db.Test/MaxMind.Db.Test.csproj
@@ -26,6 +26,7 @@
     <AnalysisLevel>latest</AnalysisLevel>
     <EnableNETAnalyzers>true</EnableNETAnalyzers>
     <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/MaxMind.Db/MaxMind.Db.csproj b/MaxMind.Db/MaxMind.Db.csproj
index 25c911b..1209827 100644
--- a/MaxMind.Db/MaxMind.Db.csproj
+++ b/MaxMind.Db/MaxMind.Db.csproj
@@ -32,6 +32,7 @@
     <AnalysisLevel>latest</AnalysisLevel>
     <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
     <EnableNETAnalyzers>true</EnableNETAnalyzers>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
   <ItemGroup>