Hello Emelie! Yes, you can use subjuntive in that sentence, and that is because it is very used in subordinate clauses. I would say you will need it in most of them. To clarify much better when to use it, check this article out that is written in Spanish: http://laisladelespanol.com/el-subjuntivo-en-oraciones-subordinadas/ Very good luck and keep working like you already do! :)

Se necesita el subjuntivo después de "hay riesgo de que". Por ejemplo: Hay riesgo de que pierdas lo ganado. Es más, hay un gran riesgo de que lo pierdas.