diff --git a/docs-gitbook/SUMMARY.md b/docs-gitbook/SUMMARY.md
index 44a40ae78..9e4ab6e33 100644
--- a/docs-gitbook/SUMMARY.md
+++ b/docs-gitbook/SUMMARY.md
@@ -37,6 +37,7 @@
 - [IPLD Resolver](../specs/ipld-resolver.md)
 - [Materializer](../specs/materializer.md)
 - [Top-down Finality](../specs/topdown.md)
+- [Bottom Up Checkpoint](../specs/bottom-up-interaction.md)
 
 ## Reference
 
diff --git a/spec/bottom up interraction.md b/specs/bottom-up-interaction.md
similarity index 99%
rename from spec/bottom up interraction.md
rename to specs/bottom-up-interaction.md
index caf2177cd..15e42c7fe 100644
--- a/spec/bottom up interraction.md	
+++ b/specs/bottom-up-interaction.md
@@ -116,4 +116,4 @@ To overcome this issue, ideally cross messages would *not* be executed in the bl
 <aside>
 💡 Because of the untractable nature or cross-net message gas limits, currently only `fund` and `release` messages are allowed.
 
-</aside>
\ No newline at end of file
+</aside>