diff --git a/doc/table_of_contents_.md b/doc/table_of_contents_.md
index 67dc673b06..11a16b687f 100644
--- a/doc/table_of_contents_.md
+++ b/doc/table_of_contents_.md
@@ -19,7 +19,7 @@
 - [merkle_proof graph](merkle_proof/merkle_proof.png) - Example merkle proof with pruning applied
 - [pruning](pruning.md) - Technical explanation of pruning
 - [stratum](stratum.md) - Technical explanation of Grin Stratum RPC protocol
-- [transaction UML](wallet/transaction/basic-transaction-wf.png) - UML of an interactive transaction (aggregating transaction without `lock_height`)
+- [transaction UML](https://github.com/mimblewimble/grin-wallet/blob/master/doc/transaction/basic-transaction-wf.png) - UML of an interactive transaction (aggregating transaction without `lock_height`)
 
 ## Build and use