diff --git a/src/index.js b/src/index.js
index 7ad7598..f3b3f9e 100644
--- a/src/index.js
+++ b/src/index.js
@@ -15,6 +15,15 @@ export default class {
       this.population = population;
       this.populationSize = populationSize;
       this.chanceOfMutation = chanceOfMutation;
+      
+      this.populate = this.populate.bind(this);
+      this.mutate = this.mutate.bind(this);
+      this.crossover = this.crossover.bind(this);
+      this.isABetterThanB = this.isABetterThanB.bind(this);
+      this.compete = this.compete.bind(this);
+      this.mixPopulationOrder = this.mixPopulationOrder.bind(this);
+      this.evolve = this.evolve.bind(this);
+      this.best = this.best.bind(this);
   }
 
   populate () {