diff --git a/src/2_a_mental_model_for_futures.md b/src/2_a_mental_model_for_futures.md
index 8f38391..fbc1834 100644
--- a/src/2_a_mental_model_for_futures.md
+++ b/src/2_a_mental_model_for_futures.md
@@ -6,7 +6,7 @@ works toghether. I hope this will make it easier to understand what we just read
 about in the previous chapter and also explain why we take a deep dive into topics
 like trait objects and generators in the next few chapters.
 
-This is not the only way to model this since we're making assumtions on runtime
+This is not the only way to model this since we're making assumptions on runtime
 specifics that can vary a great deal, but it's the way I found it easiest to
 build upon. Finally, please note that the code itself is "pseudo-rust" due to
 the need for brevity and clarity.