diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/planner/tabs/CriticalPathBuilder.java b/libreplan-webapp/src/main/java/org/libreplan/web/planner/tabs/CriticalPathBuilder.java
index f0266f71c..787126bf5 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/planner/tabs/CriticalPathBuilder.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/planner/tabs/CriticalPathBuilder.java
@@ -74,7 +74,7 @@ public class CriticalPathBuilder {
         IAdHocTransactionService transactionService = Registry
                 .getTransactionService();
         return transactionService
-                .runOnTransaction(new IOnTransaction<List<TaskElement>>() {
+                .runOnReadOnlyTransaction(new IOnTransaction<List<TaskElement>>() {
                     @Override
                     public List<TaskElement> execute() {
                         PlanningState state = retrieveOrCreate();
diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/planner/tabs/DashboardTabCreator.java b/libreplan-webapp/src/main/java/org/libreplan/web/planner/tabs/DashboardTabCreator.java
index 324b757ba..25084ad33 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/planner/tabs/DashboardTabCreator.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/planner/tabs/DashboardTabCreator.java
@@ -140,7 +140,7 @@ public class DashboardTabCreator {
         IAdHocTransactionService transactionService = Registry
                 .getTransactionService();
         return transactionService
-                .runOnTransaction(new IOnTransaction<PlanningState>() {
+                .runOnReadOnlyTransaction(new IOnTransaction<PlanningState>() {
                     @Override
                     public PlanningState execute() {
                         return planningStateCreator.retrieveOrCreate(desktop,