diff --git a/doc/src/SUMMARY.md b/doc/src/SUMMARY.md
index f88b9feccdce9..29894869eecfc 100644
--- a/doc/src/SUMMARY.md
+++ b/doc/src/SUMMARY.md
@@ -31,4 +31,4 @@
   - [15: Contracts and Tests for SIMD Intrinsics](./challenges/0015-intrinsics-simd.md)
   - [16: Verify the safety of Iterator functions](./challenges/0016-iter.md)
   - [17: Verify the safety of slice functions](./challenges/0017-slice.md)
-  - [18: Verify the safety of slice iter functions](./challenges/0018-slice-iter-pt1.md)
+  - [18: Verify the safety of slice iter functions](./challenges/0018-slice-iter.md)