diff --git a/documentation/ps-arch.md b/documentation/ps-arch.md
index 5b5905ecb367bf90222d6a654d7b974ea079c73c..baca97496d63e8154137e933728247a91d0eb3ce 100644
--- a/documentation/ps-arch.md
+++ b/documentation/ps-arch.md
@@ -10,4 +10,4 @@ In the figure yellow is Microdep parts and blue is Perfsonar parts.
 Other performance data in Perfsonar should also be available to the Microdep analyst(NOC), so some of kind of integration using web-links should be provided. On the microdep side there is protoype code for the MA browser and tracetree. The present topolgy DB can be reused, whereas the topology crawler would be a new piece of code. The present webmap interfaces to json-data from ElasticSearch, and should be adapted to the PS JSON API.
 The gap analysis has a PS MA module already, but should be restructured to be more maintainable.
 
-![system architecture](ps-arch.png)
+![system architecture](ps-arch.svg)