diff --git a/src/types/io.ts b/src/types/io.ts
index 82fabc0f..57f0d590 100644
--- a/src/types/io.ts
+++ b/src/types/io.ts
@@ -152,14 +152,14 @@ export type AoEpochData = {
   epochIndex: AoEpochIndex;
   startHeight: BlockHeight;
   observations: AoEpochObservationData;
-  prescribedObservers: AoEpochPrescribedObservers;
+  prescribedObservers: AoWeightedObserver[];
   prescribedNames: string[];
   startTimestamp: Timestamp;
   endTimestamp: Timestamp;
   distributionTimestamp: Timestamp;
+  // @deprecated - use `getDistributions` to get distribution data for a given epoch
   distributions: AoEpochDistributionData;
 };
-
 export type AoTokenSupplyData = {
   total: number;
   circulating: number;
diff --git a/tests/e2e/esm/index.test.ts b/tests/e2e/esm/index.test.ts
index d63d71c8..a3169b32 100644
--- a/tests/e2e/esm/index.test.ts
+++ b/tests/e2e/esm/index.test.ts
@@ -402,8 +402,7 @@ describe('e2e esm tests', async () => {
       assert.ok(prescribedNames);
     });
 
-    // TODO: come back to this once the observer contract is updated
-    it.skip('should return the prescribed observers for a given epoch', async () => {
+    it('should return the prescribed observers for a given epoch', async () => {
       const observers = await ario.getPrescribedObservers();
       assert.ok(observers);
       for (const observer of observers) {