diff --git a/code/03-structure/README.md b/code/03-structure/README.md
index bfc5901..f0df307 100644
--- a/code/03-structure/README.md
+++ b/code/03-structure/README.md
@@ -4,7 +4,7 @@ The requirements are:
 
 * CMake 3.11 or better; 3.14+ highly recommended.
 * A C++17 compatible compiler
-* The Boost libararies (header only part is fine)
+* The Boost libraries (header only part is fine)
 * Git
 * Doxygen (optional)