diff --git a/aggregator/aggregator.go b/aggregator/aggregator.go
index ad51bb3..346f1bd 100644
--- a/aggregator/aggregator.go
+++ b/aggregator/aggregator.go
@@ -81,7 +81,9 @@ type Aggregator struct {
 	finalProof     chan finalProofMsg
 	verifyingProof bool
 
-	witnessRetrievalChan chan *state.DBBatch
+	activeWitnessRetrievalWorkers      int
+	witnessRetrievalChan               chan *state.DBBatch
+	activeWitnessRetrievalWorkersMutex sync.Mutex
 
 	srv  *grpc.Server
 	ctx  context.Context
@@ -165,21 +167,23 @@ func New(
 	}
 
 	a := &Aggregator{
-		cfg:                     cfg,
-		state:                   stateInterface,
-		etherman:                etherman,
-		ethTxManager:            ethTxManager,
-		streamClient:            streamClient,
-		l1Syncr:                 l1Syncr,
-		profitabilityChecker:    profitabilityChecker,
-		stateDBMutex:            &sync.Mutex{},
-		timeSendFinalProofMutex: &sync.RWMutex{},
-		timeCleanupLockedProofs: cfg.CleanupLockedProofsInterval,
-		finalProof:              make(chan finalProofMsg),
-		currentBatchStreamData:  []byte{},
-		aggLayerClient:          aggLayerClient,
-		sequencerPrivateKey:     sequencerPrivateKey,
-		witnessRetrievalChan:    make(chan *state.DBBatch, cfg.MaxWitnessRetrievalWorkers),
+		cfg:                                cfg,
+		state:                              stateInterface,
+		etherman:                           etherman,
+		ethTxManager:                       ethTxManager,
+		streamClient:                       streamClient,
+		l1Syncr:                            l1Syncr,
+		profitabilityChecker:               profitabilityChecker,
+		stateDBMutex:                       &sync.Mutex{},
+		timeSendFinalProofMutex:            &sync.RWMutex{},
+		timeCleanupLockedProofs:            cfg.CleanupLockedProofsInterval,
+		finalProof:                         make(chan finalProofMsg),
+		currentBatchStreamData:             []byte{},
+		aggLayerClient:                     aggLayerClient,
+		sequencerPrivateKey:                sequencerPrivateKey,
+		witnessRetrievalChan:               make(chan *state.DBBatch, cfg.MaxWitnessRetrievalWorkers),
+		activeWitnessRetrievalWorkers:      0,
+		activeWitnessRetrievalWorkersMutex: sync.Mutex{},
 	}
 
 	log.Infof("MaxWitnessRetrievalWorkers set to %d", cfg.MaxWitnessRetrievalWorkers)
@@ -197,7 +201,12 @@ func (a *Aggregator) retrieveWitnesses() {
 		case <-a.ctx.Done():
 			return
 		case dbBatch := <-a.witnessRetrievalChan:
-			go a.retrieveWitness(dbBatch)
+			a.activeWitnessRetrievalWorkersMutex.Lock()
+			if a.activeWitnessRetrievalWorkers < a.cfg.MaxWitnessRetrievalWorkers {
+				go a.retrieveWitness(dbBatch)
+				a.activeWitnessRetrievalWorkers++
+			}
+			a.activeWitnessRetrievalWorkersMutex.Unlock()
 		}
 	}
 }
@@ -226,6 +235,10 @@ func (a *Aggregator) retrieveWitness(dbBatch *state.DBBatch) {
 
 		success = true
 	}
+
+	a.activeWitnessRetrievalWorkersMutex.Lock()
+	a.activeWitnessRetrievalWorkers--
+	a.activeWitnessRetrievalWorkersMutex.Unlock()
 }
 
 func (a *Aggregator) handleReorg(reorgData synchronizer.ReorgExecutionResult) {