diff --git a/README.md b/README.md
index f253ba7..a69cee9 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@ docker run ghcr.io/uomresearchit/workflowhub-graph:latest source-crates
 
 ## Overview
 
-![arch_diagram.png](./docs/images/arch_diagram.png)
+![source ro crates, merge files, all](./docs/images/workflow.svg)
 
 ## License
 
diff --git a/docs/images/workflow.svg b/docs/images/workflow.svg
new file mode 100644
index 0000000..4fc56ce
--- /dev/null
+++ b/docs/images/workflow.svg
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
+ "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!-- Generated by graphviz version 2.43.0 (0)
+ -->
+<!-- Title: snakemake_dag Pages: 1 -->
+<svg width="107pt" height="188pt"
+ viewBox="0.00 0.00 107.00 188.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 184)">
+<title>snakemake_dag</title>
+<polygon fill="white" stroke="transparent" points="-4,4 -4,-184 103,-184 103,4 -4,4"/>
+<!-- 0 -->
+<g id="node1" class="node">
+<title>0</title>
+<path fill="none" stroke="#59d856" stroke-width="2" stroke-dasharray="5,2" d="M64.5,-36C64.5,-36 34.5,-36 34.5,-36 28.5,-36 22.5,-30 22.5,-24 22.5,-24 22.5,-12 22.5,-12 22.5,-6 28.5,0 34.5,0 34.5,0 64.5,0 64.5,0 70.5,0 76.5,-6 76.5,-12 76.5,-12 76.5,-24 76.5,-24 76.5,-30 70.5,-36 64.5,-36"/>
+<text text-anchor="middle" x="49.5" y="-15.5" font-family="sans" font-size="10.00">all</text>
+</g>
+<!-- 1 -->
+<g id="node2" class="node">
+<title>1</title>
+<path fill="none" stroke="#56d8d8" stroke-width="2" stroke-dasharray="5,2" d="M74.5,-108C74.5,-108 24.5,-108 24.5,-108 18.5,-108 12.5,-102 12.5,-96 12.5,-96 12.5,-84 12.5,-84 12.5,-78 18.5,-72 24.5,-72 24.5,-72 74.5,-72 74.5,-72 80.5,-72 86.5,-78 86.5,-84 86.5,-84 86.5,-96 86.5,-96 86.5,-102 80.5,-108 74.5,-108"/>
+<text text-anchor="middle" x="49.5" y="-87.5" font-family="sans" font-size="10.00">merge_files</text>
+</g>
+<!-- 1&#45;&gt;0 -->
+<g id="edge1" class="edge">
+<title>1&#45;&gt;0</title>
+<path fill="none" stroke="grey" stroke-width="2" d="M49.5,-71.7C49.5,-63.98 49.5,-54.71 49.5,-46.11"/>
+<polygon fill="grey" stroke="grey" stroke-width="2" points="53,-46.1 49.5,-36.1 46,-46.1 53,-46.1"/>
+</g>
+<!-- 2 -->
+<g id="node3" class="node">
+<title>2</title>
+<path fill="none" stroke="#d6d856" stroke-width="2" stroke-dasharray="5,2" d="M87,-180C87,-180 12,-180 12,-180 6,-180 0,-174 0,-168 0,-168 0,-156 0,-156 0,-150 6,-144 12,-144 12,-144 87,-144 87,-144 93,-144 99,-150 99,-156 99,-156 99,-168 99,-168 99,-174 93,-180 87,-180"/>
+<text text-anchor="middle" x="49.5" y="-159.5" font-family="sans" font-size="10.00">source_ro_crates</text>
+</g>
+<!-- 2&#45;&gt;1 -->
+<g id="edge2" class="edge">
+<title>2&#45;&gt;1</title>
+<path fill="none" stroke="grey" stroke-width="2" d="M49.5,-143.7C49.5,-135.98 49.5,-126.71 49.5,-118.11"/>
+<polygon fill="grey" stroke="grey" stroke-width="2" points="53,-118.1 49.5,-108.1 46,-118.1 53,-118.1"/>
+</g>
+</g>
+</svg>