diff --git a/Command/ScheduleCommand.php b/Command/ScheduleCommand.php
index fa6fe57a..c0574cfa 100644
--- a/Command/ScheduleCommand.php
+++ b/Command/ScheduleCommand.php
@@ -100,7 +100,7 @@ private function scheduleJobs(OutputInterface $output, ManagerRegistry $registry
         }
     }
 
-    private function acquireLock(ManagerRegistry $registry, $commandName, \DateTime $lastRunAt)
+    private function acquireLock(ManagerRegistry $registry, $commandName, \DateTimeInterface $lastRunAt)
     {
         /** @var EntityManager $em */
         $em = $registry->getManagerForClass(CronJob::class);
diff --git a/Console/CronCommand.php b/Console/CronCommand.php
index 8dc952ea..3092d2e8 100644
--- a/Console/CronCommand.php
+++ b/Console/CronCommand.php
@@ -9,10 +9,10 @@ interface CronCommand
     /**
      * @return Job
      */
-    public function createCronJob(\DateTime $lastRunAt);
+    public function createCronJob(\DateTimeInterface $lastRunAt);
 
     /**
      * @return boolean
      */
-    public function shouldBeScheduled(\DateTime $lastRunAt);
+    public function shouldBeScheduled(\DateTimeInterface $lastRunAt);
 }
\ No newline at end of file
diff --git a/Console/ScheduleInSecondInterval.php b/Console/ScheduleInSecondInterval.php
index bf868375..1a6e2bea 100644
--- a/Console/ScheduleInSecondInterval.php
+++ b/Console/ScheduleInSecondInterval.php
@@ -7,12 +7,12 @@
 
 trait ScheduleInSecondInterval
 {
-    public function shouldBeScheduled(\DateTime $lastRunAt)
+    public function shouldBeScheduled(\DateTimeInterface $lastRunAt)
     {
         return time() - $lastRunAt->getTimestamp() >= $this->getScheduleInterval();
     }
 
-    public function createCronJob(\DateTime $_)
+    public function createCronJob(\DateTimeInterface $_)
     {
         if ( ! $this instanceof Command) {
             throw new \LogicException('This trait must be used in Symfony console commands only.');
diff --git a/Cron/CommandScheduler.php b/Cron/CommandScheduler.php
index 106485b0..8d8eaa1e 100644
--- a/Cron/CommandScheduler.php
+++ b/Cron/CommandScheduler.php
@@ -13,12 +13,12 @@ public function __construct(CronCommand $command)
         $this->command = $command;
     }
 
-    public function shouldSchedule($_, \DateTime $lastRunAt)
+    public function shouldSchedule($_, \DateTimeInterface $lastRunAt)
     {
         return $this->command->shouldBeScheduled($lastRunAt);
     }
 
-    public function createJob($_, \DateTime $lastRunAt)
+    public function createJob($_, \DateTimeInterface $lastRunAt)
     {
         return $this->command->createCronJob($lastRunAt);
     }
diff --git a/Cron/JobScheduler.php b/Cron/JobScheduler.php
index f4a55caf..957b0beb 100644
--- a/Cron/JobScheduler.php
+++ b/Cron/JobScheduler.php
@@ -9,10 +9,10 @@ interface JobScheduler
     /**
      * @return boolean
      */
-    public function shouldSchedule($command, \DateTime $lastRunAt);
+    public function shouldSchedule($command, \DateTimeInterface $lastRunAt);
 
     /**
      * @return Job
      */
-    public function createJob($command, \DateTime $lastRunAt);
+    public function createJob($command, \DateTimeInterface $lastRunAt);
 }
\ No newline at end of file
diff --git a/Entity/Job.php b/Entity/Job.php
index ccfd6aa9..2fb2538c 100644
--- a/Entity/Job.php
+++ b/Entity/Job.php
@@ -352,7 +352,7 @@ public function getExecuteAfter()
         return $this->executeAfter;
     }
 
-    public function setExecuteAfter(\DateTime $executeAfter)
+    public function setExecuteAfter(\DateTimeInterface $executeAfter)
     {
         $this->executeAfter = $executeAfter;
     }
diff --git a/Resources/doc/scheduled_jobs.rst b/Resources/doc/scheduled_jobs.rst
index 19b9d63d..d267f621 100644
--- a/Resources/doc/scheduled_jobs.rst
+++ b/Resources/doc/scheduled_jobs.rst
@@ -17,12 +17,12 @@ Implement CronCommand
     {
         // configure, execute, etc. ...
 
-        public function shouldBeScheduled(\DateTime $lastRunAt)
+        public function shouldBeScheduled(\DateTimeInterface $lastRunAt)
         {
             return time() - $lastRunAt->getTimestamp() >= 60; // Executed at most every minute.
         }
 
-        public function createCronJob(\DateTime $lastRunAt)
+        public function createCronJob(\DateTimeInterface $lastRunAt)
         {
             return new Job('my-scheduled-command');
         }
@@ -54,7 +54,7 @@ This is useful if you want to run a third-party command or a Symfony command as
      */
     class MyJobScheduler implements JobScheduler
     {
-        public function shouldSchedule($commandName, \DateTime $lastRunAt)
+        public function shouldSchedule($commandName, \DateTimeInterface $lastRunAt)
         {
             return time() - $lastRunAt->getTimestamp() >= 60; // Executed at most every minute.
         }
diff --git a/Tests/Functional/TestBundle/Command/ScheduledEveryFewSecondsCommand.php b/Tests/Functional/TestBundle/Command/ScheduledEveryFewSecondsCommand.php
index e3c563a6..b3f1472e 100644
--- a/Tests/Functional/TestBundle/Command/ScheduledEveryFewSecondsCommand.php
+++ b/Tests/Functional/TestBundle/Command/ScheduledEveryFewSecondsCommand.php
@@ -10,12 +10,12 @@
 
 class ScheduledEveryFewSecondsCommand extends ContainerAwareCommand implements CronCommand
 {
-    public function shouldBeScheduled(\DateTime $lastRunAt)
+    public function shouldBeScheduled(\DateTimeInterface $lastRunAt)
     {
         return time() - $lastRunAt->getTimestamp() >= 5;
     }
 
-    public function createCronJob(\DateTime $_)
+    public function createCronJob(\DateTimeInterface $_)
     {
         return new Job('scheduled-every-few-seconds');
     }