diff --git a/indexer/indexer.go b/indexer/indexer.go
index 5364c620..02902158 100644
--- a/indexer/indexer.go
+++ b/indexer/indexer.go
@@ -488,7 +488,13 @@ func (indexer *Indexer) processHeadBlock(slot uint64, header *rpctypes.StandardV
 		}
 		if !reachedEnd {
 			logger.Errorf("Large chain reorg detected, resync needed")
-			// TODO: Drop all unfinalized & resync
+			// TODO: Start synchronization
+		} else {
+			reorgMinEpoch := utils.EpochOfSlot(uint64(canonicalBlock.Header.Data.Header.Message.Slot))
+			if reorgMinEpoch <= indexer.state.lastProcessedEpoch {
+				logger.Infof("Chain reorg touched processed epochs, reset epoch processing to %v", reorgMinEpoch-1)
+				indexer.state.lastProcessedEpoch = reorgMinEpoch - 1
+			}
 		}
 	}
 	indexer.state.lastHeadBlock = slot
@@ -610,8 +616,9 @@ func (indexer *Indexer) loadEpochValidators(epoch uint64, epochStats *EpochStats
 func (indexer *Indexer) processIndexing() {
 	// process old epochs
 	currentEpoch := utils.EpochOfSlot(indexer.state.lastHeadBlock)
-	processEpoch := currentEpoch - uint64(indexer.epochProcessingDelay)
-	if indexer.state.lastProcessedEpoch < processEpoch {
+	maxProcessEpoch := currentEpoch - uint64(indexer.epochProcessingDelay)
+	for indexer.state.lastProcessedEpoch < maxProcessEpoch {
+		processEpoch := indexer.state.lastProcessedEpoch + 1
 		indexer.processEpoch(processEpoch)
 		indexer.state.lastProcessedEpoch = processEpoch
 	}