diff --git a/thoth-core-akka/src/main/java/fr/maif/akka/eventsourcing/DefaultAggregateStore.java b/thoth-core-akka/src/main/java/fr/maif/akka/eventsourcing/DefaultAggregateStore.java
index 15b00325..b17762f5 100644
--- a/thoth-core-akka/src/main/java/fr/maif/akka/eventsourcing/DefaultAggregateStore.java
+++ b/thoth-core-akka/src/main/java/fr/maif/akka/eventsourcing/DefaultAggregateStore.java
@@ -19,7 +19,7 @@ public DefaultAggregateStore(EventStore<TxCtx, E, Meta, Context> eventStore, Eve
     }
 
     public DefaultAggregateStore(EventStore<TxCtx, E, Meta, Context> eventStore, EventHandler<S, E> eventEventHandler, Materializer materializer, TransactionManager<TxCtx> transactionManager) {
-        super(eventStore, eventEventHandler, transactionManager);
+        super(eventStore, eventEventHandler, transactionManager, shouldLockEntityForUpdate);
         this.materializer = materializer;
     }
 
diff --git a/thoth-core-reactor/src/main/java/fr/maif/reactor/eventsourcing/DefaultAggregateStore.java b/thoth-core-reactor/src/main/java/fr/maif/reactor/eventsourcing/DefaultAggregateStore.java
index 4f95829a..c822f755 100644
--- a/thoth-core-reactor/src/main/java/fr/maif/reactor/eventsourcing/DefaultAggregateStore.java
+++ b/thoth-core-reactor/src/main/java/fr/maif/reactor/eventsourcing/DefaultAggregateStore.java
@@ -16,8 +16,8 @@
 public class DefaultAggregateStore<S extends State<S>, E extends Event, Meta, Context, TxCtx> extends AbstractDefaultAggregateStore<S, E, Meta, Context, TxCtx> implements AggregateStore<S, String, TxCtx> {
 
 
-    public DefaultAggregateStore(EventStore<TxCtx, E, Meta, Context> eventStore, EventHandler<S, E> eventEventHandler, TransactionManager<TxCtx> transactionManager) {
-        super(eventStore, eventEventHandler, transactionManager);
+    public DefaultAggregateStore(EventStore<TxCtx, E, Meta, Context> eventStore, EventHandler<S, E> eventEventHandler, TransactionManager<TxCtx> transactionManager, Boolean shouldLockEntityForUpdate) {
+        super(eventStore, eventEventHandler, transactionManager, shouldLockEntityForUpdate);
     }
 
     @Override
diff --git a/thoth-core/src/main/java/fr/maif/eventsourcing/EventStore.java b/thoth-core/src/main/java/fr/maif/eventsourcing/EventStore.java
index 0a46d39e..c4ab91ac 100644
--- a/thoth-core/src/main/java/fr/maif/eventsourcing/EventStore.java
+++ b/thoth-core/src/main/java/fr/maif/eventsourcing/EventStore.java
@@ -72,6 +72,7 @@ class Query {
         public final Long sequenceFrom;
         public final Long sequenceTo;
         public final Boolean published;
+        public final Boolean shouldLockEntity;
 
         private Query(Query.Builder builder) {
             this.dateFrom = builder.dateFrom;
@@ -83,6 +84,7 @@ private Query(Query.Builder builder) {
             this.published = builder.published;
             this.sequenceFrom = builder.sequenceFrom;
             this.sequenceTo = builder.sequenceTo;
+            this.shouldLockEntity = builder.shouldLockEntity;
         }
 
         public static Builder builder() {
@@ -152,6 +154,7 @@ public static class Builder {
             Boolean published;
             Long sequenceFrom;
             Long sequenceTo;
+            Boolean shouldLockEntity;
 
             public Builder withDateFrom(LocalDateTime dateFrom) {
                 this.dateFrom = dateFrom;
@@ -198,6 +201,12 @@ public Builder withSequenceTo(Long sequenceTo) {
                 return this;
             }
 
+
+            public Builder withShouldLockEntity(Boolean shouldLockEntity) {
+                this.shouldLockEntity = shouldLockEntity;
+                return this;
+            }
+
             public Query build() {
                 return new Query(this);
             }
diff --git a/thoth-core/src/main/java/fr/maif/eventsourcing/impl/AbstractDefaultAggregateStore.java b/thoth-core/src/main/java/fr/maif/eventsourcing/impl/AbstractDefaultAggregateStore.java
index 3f019f1a..41d36a45 100644
--- a/thoth-core/src/main/java/fr/maif/eventsourcing/impl/AbstractDefaultAggregateStore.java
+++ b/thoth-core/src/main/java/fr/maif/eventsourcing/impl/AbstractDefaultAggregateStore.java
@@ -10,6 +10,7 @@
 import io.vavr.control.Option;
 import org.reactivestreams.Publisher;
 
+import java.util.Objects;
 import java.util.concurrent.CompletionStage;
 import java.util.function.BiFunction;
 
@@ -19,10 +20,13 @@ public abstract class AbstractDefaultAggregateStore<S extends State<S>, E extend
     private final EventHandler<S, E> eventEventHandler;
     private final TransactionManager<TxCtx> transactionManager;
 
-    public AbstractDefaultAggregateStore(EventStore<TxCtx, E, Meta, Context> eventStore, EventHandler<S, E> eventEventHandler, TransactionManager<TxCtx> transactionManager) {
+    private final Boolean shouldLockEntityForUpdate;
+
+    public AbstractDefaultAggregateStore(EventStore<TxCtx, E, Meta, Context> eventStore, EventHandler<S, E> eventEventHandler, TransactionManager<TxCtx> transactionManager, Boolean shouldLockEntityForUpdate) {
         this.eventStore = eventStore;
         this.eventEventHandler = eventEventHandler;
         this.transactionManager = transactionManager;
+        this.shouldLockEntityForUpdate = Objects.requireNonNullElse(shouldLockEntityForUpdate, false);
     }
 
     @Override
@@ -38,9 +42,9 @@ public CompletionStage<Option<S>> getAggregate(TxCtx ctx, String entityId) {
 
                     EventStore.Query query = mayBeSnapshot.fold(
                             // No snapshot defined, we read all the events
-                            () -> EventStore.Query.builder().withEntityId(entityId).build(),
+                            () -> EventStore.Query.builder().withEntityId(entityId).withShouldLockEntity(this.shouldLockEntityForUpdate).build(),
                             // If a snapshot is defined, we read events from seq num of the snapshot :
-                            s -> EventStore.Query.builder().withSequenceFrom(s.sequenceNum()).withEntityId(entityId).build()
+                            s -> EventStore.Query.builder().withSequenceFrom(s.sequenceNum()).withEntityId(entityId).withShouldLockEntity(this.shouldLockEntityForUpdate).build()
                     );
 
                     return fold(this.eventStore.loadEventsByQuery(ctx, query),
diff --git a/thoth-jooq-reactor/src/main/java/fr/maif/eventsourcing/ReactivePostgresEventStore.java b/thoth-jooq-reactor/src/main/java/fr/maif/eventsourcing/ReactivePostgresEventStore.java
index ce038118..e744ec85 100644
--- a/thoth-jooq-reactor/src/main/java/fr/maif/eventsourcing/ReactivePostgresEventStore.java
+++ b/thoth-jooq-reactor/src/main/java/fr/maif/eventsourcing/ReactivePostgresEventStore.java
@@ -273,10 +273,18 @@ public Publisher<EventEnvelope<E, Meta, Context>> loadEventsByQuery(Tx tx, Query
                     .from(table(this.tableNames.tableName))
                     .where(clauses.toJavaList())
                     .orderBy(SEQUENCE_NUM);
+
             if (Objects.nonNull(query.size)) {
+                if (Boolean.TRUE.equals(query.shouldLockEntity)) {
+                    return queryBuilder.limit(query.size).forUpdate().wait(120);
+                }
                 return queryBuilder.limit(query.size);
             }
-            return queryBuilder;
+            if (Boolean.TRUE.equals(query.shouldLockEntity)) {
+                return queryBuilder.forUpdate().wait(120);
+            } else {
+                return queryBuilder;
+            }
         })).concatMap(this::rsToEnvelope);
     }
 
diff --git a/thoth-jooq-reactor/src/main/java/fr/maif/eventsourcing/ReactivePostgresKafkaEventProcessorBuilder.java b/thoth-jooq-reactor/src/main/java/fr/maif/eventsourcing/ReactivePostgresKafkaEventProcessorBuilder.java
index 6de716cb..cf1b03c2 100644
--- a/thoth-jooq-reactor/src/main/java/fr/maif/eventsourcing/ReactivePostgresKafkaEventProcessorBuilder.java
+++ b/thoth-jooq-reactor/src/main/java/fr/maif/eventsourcing/ReactivePostgresKafkaEventProcessorBuilder.java
@@ -338,6 +338,10 @@ public BuilderWithAggregateStore<S, E, Meta, Context> withAggregateStore(Aggrega
         }
 
         public BuilderWithAggregateStore<S, E, Meta, Context> withDefaultAggregateStore() {
+            return this.withDefaultAggregateStore(false);
+        }
+
+        public BuilderWithAggregateStore<S, E, Meta, Context> withDefaultAggregateStore(boolean shouldLockEntityForUpdate) {
             return new BuilderWithAggregateStore<>(
                     pgAsyncPool,
                     tableNames,
@@ -349,7 +353,7 @@ public BuilderWithAggregateStore<S, E, Meta, Context> withDefaultAggregateStore(
                     concurrentReplayStrategy,
                     eventStore,
                     eventHandler,
-                    new DefaultAggregateStore<>(eventStore, eventHandler, transactionManager));
+                    new DefaultAggregateStore<>(eventStore, eventHandler, transactionManager, shouldLockEntityForUpdate));
         }
     }
 
diff --git a/thoth-jooq/src/main/java/fr/maif/eventsourcing/PostgresKafkaEventProcessor.java b/thoth-jooq/src/main/java/fr/maif/eventsourcing/PostgresKafkaEventProcessor.java
index 1ea7496c..8e319eb8 100644
--- a/thoth-jooq/src/main/java/fr/maif/eventsourcing/PostgresKafkaEventProcessor.java
+++ b/thoth-jooq/src/main/java/fr/maif/eventsourcing/PostgresKafkaEventProcessor.java
@@ -81,7 +81,7 @@ public PostgresKafkaEventProcessorConfig(
                     metaFormat,
                     contextFormat
             );
-            this.aggregateStore = aggregateStore == null ? new DefaultAggregateStore<>(this.eventStore, eventHandler, transactionManager) : aggregateStore;
+            this.aggregateStore = aggregateStore == null ? new DefaultAggregateStore<>(this.eventStore, eventHandler, transactionManager, false) : aggregateStore;
             this.commandHandler = commandHandler;
             this.eventHandler = eventHandler;
             this.projections = projections;
@@ -154,7 +154,7 @@ public PostgresKafkaEventProcessorConfig(
             this.eventHandler = eventHandler;
             this.projections = projections;
             this.eventPublisher = eventPublisher;
-            this.aggregateStore = new DefaultAggregateStore<>(this.eventStore, eventHandler, transactionManager);
+            this.aggregateStore = new DefaultAggregateStore<>(this.eventStore, eventHandler, transactionManager, false);
         }
     }
 }
diff --git a/thoth-jooq/src/main/java/fr/maif/eventsourcing/PostgresKafkaEventProcessorBuilder.java b/thoth-jooq/src/main/java/fr/maif/eventsourcing/PostgresKafkaEventProcessorBuilder.java
index 5a216503..d68de32c 100644
--- a/thoth-jooq/src/main/java/fr/maif/eventsourcing/PostgresKafkaEventProcessorBuilder.java
+++ b/thoth-jooq/src/main/java/fr/maif/eventsourcing/PostgresKafkaEventProcessorBuilder.java
@@ -370,6 +370,10 @@ public BuilderWithAggregateStore<S, E, Meta, Context> withAggregateStore(Aggrega
         }
 
         public BuilderWithAggregateStore<S, E, Meta, Context> withDefaultAggregateStore() {
+            return this.withDefaultAggregateStore(false);
+        }
+
+        public BuilderWithAggregateStore<S, E, Meta, Context> withDefaultAggregateStore(boolean shouldLockEntityForUpdate) {
             return new BuilderWithAggregateStore<>(
                     
                     dataSource,
@@ -382,7 +386,7 @@ public BuilderWithAggregateStore<S, E, Meta, Context> withDefaultAggregateStore(
                     concurrentReplayStrategy,
                     eventStore,
                     eventHandler,
-                    new DefaultAggregateStore<>(eventStore, eventHandler, transactionManager));
+                    new DefaultAggregateStore<>(eventStore, eventHandler, transactionManager, shouldLockEntityForUpdate));
         }
     }
 
diff --git a/thoth-jooq/src/main/java/fr/maif/eventsourcing/impl/PostgresEventStore.java b/thoth-jooq/src/main/java/fr/maif/eventsourcing/impl/PostgresEventStore.java
index 28462d10..cd8a34bf 100644
--- a/thoth-jooq/src/main/java/fr/maif/eventsourcing/impl/PostgresEventStore.java
+++ b/thoth-jooq/src/main/java/fr/maif/eventsourcing/impl/PostgresEventStore.java
@@ -307,9 +307,9 @@ public Publisher<EventEnvelope<E, Meta, Context>> loadEventsByQueryWithOptions(C
         var tmpJooqQuery = DSL.using(tx)
                 .selectFrom(SELECT_CLAUSE + " FROM " + this.tableNames.tableName)
                 .where(clauses.toJavaList())
-                .orderBy(field("sequence_num").asc())
-                ;
-        var jooqQuery = Objects.nonNull(query.size) ? tmpJooqQuery.limit(query.size) : tmpJooqQuery;
+                .orderBy(field("sequence_num").asc());
+        var jooqQueryWithSize = Objects.nonNull(query.size) ? tmpJooqQuery.limit(query.size) : tmpJooqQuery;
+        var jooqQuery = Boolean.TRUE.equals(query.shouldLockEntity) ? jooqQueryWithSize.forUpdate().wait(120) : jooqQueryWithSize;
 
         LOGGER.debug("{}", jooqQuery);
         return Flux.fromStream(() -> jooqQuery.stream().map(r -> rsToEnvelope(r.intoResultSet())))