diff --git a/book/art/fullnode.bob b/book/art/fullnode.bob
index 1133b2463c..f870958217 100644
--- a/book/art/fullnode.bob
+++ b/book/art/fullnode.bob
@@ -1,9 +1,9 @@
              .--------------------------------------.
-             |  Fullnodee                           |
+             |  Fullnode                            |
              |                                      |
  .--------.  |  .-------------------.               |
  |        |---->|                   |               |
- | Client |  |  | JSON RPC SService |               |
+ | Client |  |  | JSON RPC Service  |               |
  |        |<----|                   |               |
  `----+---`  |  `-------------------`               |
       |      |     ^                                |