diff --git a/Iceshrimp.Backend/Core/Extensions/WebApplicationExtensions.cs b/Iceshrimp.Backend/Core/Extensions/WebApplicationExtensions.cs
index 91f42a3c..1b227291 100644
--- a/Iceshrimp.Backend/Core/Extensions/WebApplicationExtensions.cs
+++ b/Iceshrimp.Backend/Core/Extensions/WebApplicationExtensions.cs
@@ -40,6 +40,12 @@ public static class WebApplicationExtensions {
 		app.Logger.LogInformation("Iceshrimp.NET v{version} ({domain})", instanceConfig.Version,
 		                          instanceConfig.AccountDomain);
 
+		if (app.Environment.IsDevelopment()) {
+			app.Logger.LogWarning("The hosting environment is set to Development.");
+			app.Logger.LogWarning("This application will not validate the Host header for incoming requests.");
+			app.Logger.LogWarning("If this is not a local development instance, please set the environment to Production.");
+		}
+
 		var provider = app.Services.CreateScope();
 		var context  = provider.ServiceProvider.GetService<DatabaseContext>();
 		if (context == null) {