diff --git a/backend/src/AmbientWeather.Api/AmbientWeather.Api.csproj b/backend/src/AmbientWeather.Api/AmbientWeather.Api.csproj
index 2d09388..ed8fa59 100644
--- a/backend/src/AmbientWeather.Api/AmbientWeather.Api.csproj
+++ b/backend/src/AmbientWeather.Api/AmbientWeather.Api.csproj
@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="Azure.Monitor.OpenTelemetry.AspNetCore" Version="1.5.0" />
-    <PackageReference Include="MediatR" Version="12.5.0" />
+    <PackageReference Include="MediatR" Version="14.2.0" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="10.0.9" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.9">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/backend/src/AmbientWeather.Application/AmbientWeather.Application.csproj b/backend/src/AmbientWeather.Application/AmbientWeather.Application.csproj
index 7f64949..857e177 100644
--- a/backend/src/AmbientWeather.Application/AmbientWeather.Application.csproj
+++ b/backend/src/AmbientWeather.Application/AmbientWeather.Application.csproj
@@ -7,7 +7,7 @@
   <ItemGroup>
     <PackageReference Include="FluentValidation" Version="12.1.1" />
     <PackageReference Include="FluentValidation.DependencyInjectionExtensions" Version="12.1.1" />
-    <PackageReference Include="MediatR" Version="12.5.0" />
+    <PackageReference Include="MediatR" Version="14.2.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.8" />
   </ItemGroup>
 
diff --git a/backend/src/AmbientWeather.Infrastructure/AmbientWeather.Infrastructure.csproj b/backend/src/AmbientWeather.Infrastructure/AmbientWeather.Infrastructure.csproj
index 397de39..5a473df 100644
--- a/backend/src/AmbientWeather.Infrastructure/AmbientWeather.Infrastructure.csproj
+++ b/backend/src/AmbientWeather.Infrastructure/AmbientWeather.Infrastructure.csproj
@@ -6,6 +6,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="MediatR" Version="14.2.0" />
     <PackageReference Include="Microsoft.AspNetCore.DataProtection" Version="10.0.9" />
     <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="10.0.9" />
     <PackageReference Include="Microsoft.Extensions.Caching.StackExchangeRedis" Version="10.0.8" />