diff --git a/backend/Program.cs b/backend/Program.cs
index 0b9b507f..562b0ddf 100644
--- a/backend/Program.cs
+++ b/backend/Program.cs
@@ -33,11 +33,11 @@
 string connectionString;
 if (builder.Environment.IsDevelopment())
 {
-    connectionString = builder.Configuration.GetConnectionString("HostConnection");
+    connectionString = builder.Configuration.GetConnectionString("HostConnection") ?? throw new InvalidOperationException("HostConnection string is missing.");
 }
 else
 {
-    connectionString = builder.Configuration.GetConnectionString("ProductionConnection");
+    connectionString = builder.Configuration.GetConnectionString("ProductionConnection") ?? throw new InvalidOperationException("ProductionConnection string is missing.");
 }
 
 builder.Services.AddMySqlDataSource(connectionString);
diff --git a/backend/appsettings.json b/backend/appsettings.json
index f5ff761d..79f3ab33 100644
--- a/backend/appsettings.json
+++ b/backend/appsettings.json
@@ -9,6 +9,6 @@
   "ConnectionStrings": {
     "DefaultConnection": "Server=mysql;Port=3306;Database=chemistry_db;User=chemistrycafedev;Password=chemistrycafe",
     "HostConnection": "Server=localhost;Port=3307;Database=chemistry_db;User=chemistrycafedev;Password=chemistrycafe",
-    "ProductionConnection": "Server=localhost;Port=3307;Database=chemistry_db;User=chemistrycafedev;Password=chemistrycafe"
+    "ProductionConnection": "Server=localhost;Port=3306;Database=chemistry_db;User=chemistrycafedev;Password=chemistrycafe"
   }
 }
diff --git a/init.sql b/init.sql
index 246c085d..e180bfcc 100644
--- a/init.sql
+++ b/init.sql
@@ -1,4 +1,5 @@
 -- init.sql
+USE chemistry_db;
 
 -- 1. Create Tables