diff --git a/config.proto b/config.proto
index 82c5981..5932ae4 100644
--- a/config.proto
+++ b/config.proto
@@ -24,9 +24,33 @@ message BlastRadiusConfig {
     int32 linkDepth = 2;
 }
 
+// This account config is stored in the `kv.Store` protobuf key-value store in
+// the api-server database. This means that as long as we don't have any
+// *breaking* changes to the protobuf, we shouldn't need to do a migration. If
+// however we do need to change this message in a breaking way, we will need to
+// do some kind of a migration (depending on the change)
 message AccountConfig {
-    // The blast radius config for this account
-    BlastRadiusConfig blastRadius = 1;
+    enum BlastRadiusPreset {
+        // Customise advanced limits.
+        CUSTOM = 0;
+        // Runs a shallow scan for dependencies. Reduces time takes to calculate
+        // blast radius, but might mean some dependencies are missed
+        QUICK = 1;
+        // An optimised balance between time taken and discovery.
+        DETAILED = 2;
+        // Discovers all possible dependencies, might take a long time and
+        // discover items that are less likely to be relevant to a change.
+        FULL = 3;
+    }
+
+    // The preset that we should use when calculating the blast radius for a
+    // change. If this is set to "CUSTOM" then the `blastRadius` config should be
+    // set
+    BlastRadiusPreset blastRadiusPreset = 2;
+
+    // The blast radius config for this account, this is only required if the
+    // preset is "CUSTOM"
+    optional BlastRadiusConfig blastRadius = 1;
 }
 
 message GetAccountConfigRequest {}