diff --git a/index.html b/index.html
index 9c1a366..efed584 100644
--- a/index.html
+++ b/index.html
@@ -38,13 +38,13 @@
         <br>
         <a href="ComputerNetworks.html">Computer Networks</a> <br>
         <br>
-        <a href="MathforComputer Scientist.html">Math for Computer Scientist</a> <br>
+        <a href="MathforComputerScientist.html">Math for Computer Scientist</a> <br>
         <br>
         <a href="TheoreticalCSandProgrammingLanguages.html">Theoretical CS and Programming Languages</a> <br>
         <br>
         <a href="EmbeddedSystems.html">Embedded Systems</a> <br>
         <br>
-        <a href="ComputerOrganizationandArchitecture<.html">Computer Organization and Architecture</a> <br>
+        <a href="ComputerOrganizationandArchitecture.html">Computer Organization and Architecture</a> <br>
         <br>
         <a href="Security.html">Security</a> <br>
         <br>