diff --git a/README.md b/README.md
index 33ad8b9..44a7735 100644
--- a/README.md
+++ b/README.md
@@ -18,11 +18,11 @@
         - [Dijkstra's](coding-algorithms/algorithms.md#dijkstras)
         - [A\*](coding-algorithms/algorithms.md#a)
     - [Sorting](coding-algorithms/sorting.md)
-        - [Insertion Sort](coding-algorithms/algorithms.md#insertion-sort)
-        - [Radix Sort](coding-algorithms/algorithms.md#radix-sort)
-        - [Quicksort](coding-algorithms/algorithms.md#quicksort)
-        - [Merge Sort](coding-algorithms/algorithms.md#merge-sort)
-        - [Heapsort](coding-algorithms/algorithms.md#heapsort)
+        - [Insertion Sort](coding-algorithms/sorting.md#insertion-sort)
+        - [Radix Sort](coding-algorithms/sorting.md#radix-sort)
+        - [Quicksort](coding-algorithms/sorting.md#quicksort)
+        - [Merge Sort](coding-algorithms/sorting.md#merge-sort)
+        - [Heapsort](coding-algorithms/sorting.md#heapsort)
     - [Data Structures](coding-algorithms/data-structures.md)
         - [Lists](coding-algorithms/data-structures.md#lists)
             - [Arrays](coding-algorithms/data-structures.md#arrays)
@@ -57,7 +57,7 @@
             - [Depth-first Search](coding-algorithms/graphs.md#depth-first-search)
     - [Recursion](coding-algorithms/recursion.md)
 - Large-scale Design
-    - [System Design](large-scale-design/system-design)
+    - [System Design](large-scale-design/system-design/index.md)
         - [Feature Sets](large-scale-design/system-design/feature-sets.md)
         - [Interfaces](large-scale-design/system-design/interfaces.md)
         - [Class Hierarchies](large-scale-design/system-design/class-hierarchies.md)