diff --git a/PKHeX.Core/PKHeX.Core.csproj b/PKHeX.Core/PKHeX.Core.csproj
index 9cf5b2a8c..463708c1d 100644
--- a/PKHeX.Core/PKHeX.Core.csproj
+++ b/PKHeX.Core/PKHeX.Core.csproj
@@ -12,6 +12,9 @@
     <RepositoryUrl>https://github.com/kwsch/PKHeX</RepositoryUrl>
     <LangVersion>9</LangVersion>
     <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)' == 'Debug'">
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>