diff --git a/03-mpi-api/03-mpi-api.tex b/03-mpi-api/03-mpi-api.tex
index 2b94650..e5b73a3 100644
--- a/03-mpi-api/03-mpi-api.tex
+++ b/03-mpi-api/03-mpi-api.tex
@@ -32,7 +32,7 @@
 }
 
 % Title, author, date, and institute (optional)
-\title[Parallel Programming. MPI (deatiled API overview)]{Parallel Programming course. MPI (deatiled API overview)}
+\title[Parallel Programming. MPI (detailed API overview)]{Parallel Programming course. MPI (detailed API overview)}
 \author{Obolenskiy Arseniy, Nesterov Alexander}
 \institute{Nizhny Novgorod State University}
 
diff --git a/index.html b/index.html
index 73a0a21..e4102f3 100644
--- a/index.html
+++ b/index.html
@@ -49,7 +49,7 @@ <h1>Parallel Programming Course slides</h1>
         <li><a href="https://learning-process.github.io/parallel_programming_slides/slides/00-handshake.pdf" target="_blank">00: Handshake</a></li>
         <li><a href="https://learning-process.github.io/parallel_programming_slides/slides/01-intro.pdf" target="_blank">01: Introduction</a></li>
         <li><a href="https://learning-process.github.io/parallel_programming_slides/slides/02-repo-structure.pdf" target="_blank">02: Repo structure</a></li>
-        <li><a href="https://learning-process.github.io/parallel_programming_slides/slides/03-mpi-api.pdf" target="_blank">03: MPI (deatiled API overview)</a></li>
+        <li><a href="https://learning-process.github.io/parallel_programming_slides/slides/03-mpi-api.pdf" target="_blank">03: MPI (detailed API overview)</a></li>
         <li><a href="https://learning-process.github.io/parallel_programming_slides/slides/04-parallelism-theory.pdf" target="_blank">04: Parallelism theory</a></li>
     </ul>
 </body>