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 There's been a Murder in SQL City! The SQL Murder Mystery is designed to be both a self-directed lesson to learn SQL concepts and commands and a fun game for experienced SQL users to solve an intriguing crime.
 
-If you just want to solve the mystery, go to [mystery.knightlab.com](http://mystery.knightlab.com). If you're new to SQL, you may want to start at [our walkthrough](http://mystery.knightlab.com/walkthrough.html). It won't teach you everything about SQL, but it should teach you all that you need to solve the mystery.  
+If you just want to solve the mystery, go to [mystery.knightlab.com](https://mystery.knightlab.com). If you're new to SQL, you may want to start at [our walkthrough](https://mystery.knightlab.com/walkthrough.html). It won't teach you everything about SQL, but it should teach you all that you need to solve the mystery.  
 
 ## What Else is Here?