diff --git a/src/Wallabag/ImportBundle/Import/PocketImport.php b/src/Wallabag/ImportBundle/Import/PocketImport.php
index f598e6112..ac68b6d92 100644
--- a/src/Wallabag/ImportBundle/Import/PocketImport.php
+++ b/src/Wallabag/ImportBundle/Import/PocketImport.php
@@ -258,6 +258,7 @@ class PocketImport implements ImportInterface
             // flush every 20 entries
             if (($i % 20) === 0) {
                 $this->em->flush();
+                $this->em->clear();
             }
             ++$i;
         }
diff --git a/src/Wallabag/ImportBundle/Import/WallabagImport.php b/src/Wallabag/ImportBundle/Import/WallabagImport.php
index d65bc5306..b265f9f10 100644
--- a/src/Wallabag/ImportBundle/Import/WallabagImport.php
+++ b/src/Wallabag/ImportBundle/Import/WallabagImport.php
@@ -185,6 +185,7 @@ abstract class WallabagImport implements ImportInterface
             // flush every 20 entries
             if (($i % 20) === 0) {
                 $this->em->flush();
+                $this->em->clear();
             }
             ++$i;
         }