diff --git a/README.md b/README.md
index 506878e..5b582cd 100644
--- a/README.md
+++ b/README.md
@@ -1573,7 +1573,7 @@ Coroutine
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 * **Similar to generator, but generator pulls data through the pipe with iteration, while coroutine pushes data into the pipeline with send().**
 * **Coroutines provide more powerful data routing possibilities than iterators.**
-* **If you built a collection of simple data processing components, you can glue them together into complex arrangements of pipes, branches, merging, etc.**
+* **If you build a collection of simple data processing components, you can glue them together into complex arrangements of pipes, branches, merging, etc.**
 
 ### Helper Decorator
 * **All coroutines must be "primed" by first calling next().**