diff --git a/src/Symfony/Bridge/Doctrine/HttpFoundation/DbalSessionHandler.php b/src/Symfony/Bridge/Doctrine/HttpFoundation/DbalSessionHandler.php
index c3570da7da..92c7b6bf40 100644
--- a/src/Symfony/Bridge/Doctrine/HttpFoundation/DbalSessionHandler.php
+++ b/src/Symfony/Bridge/Doctrine/HttpFoundation/DbalSessionHandler.php
@@ -243,7 +243,7 @@ class DbalSessionHandler implements \SessionHandlerInterface
                 return "INSERT OR REPLACE INTO $this->table ($this->idCol, $this->dataCol, $this->timeCol) VALUES (:id, :data, :time)";
             case 'postgresql' === $platform && version_compare($this->con->getServerVersion(), '9.5', '>='):
                 return "INSERT INTO $this->table ($this->idCol, $this->dataCol, $this->timeCol) VALUES (:id, :data, :time) ".
-                    "ON CONFLICT ($this->idCol) DO UPDATE SET ($this->dataCol, $this->timeCol) = (:data, :time) WHERE $this->idCol = :id";
+                    "ON CONFLICT ($this->idCol) DO UPDATE SET ($this->dataCol, $this->timeCol) = (EXCLUDED.$this->dataCol, EXCLUDED.$this->timeCol)";
         }
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
index 1aad67960a..54d94f7c05 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
@@ -678,7 +678,7 @@ class PdoSessionHandler implements \SessionHandlerInterface
                 return "INSERT OR REPLACE INTO $this->table ($this->idCol, $this->dataCol, $this->lifetimeCol, $this->timeCol) VALUES (:id, :data, :lifetime, :time)";
             case 'pgsql' === $this->driver && version_compare($this->pdo->getAttribute(\PDO::ATTR_SERVER_VERSION), '9.5', '>='):
                 return "INSERT INTO $this->table ($this->idCol, $this->dataCol, $this->lifetimeCol, $this->timeCol) VALUES (:id, :data, :lifetime, :time) ".
-                    "ON CONFLICT ($this->idCol) DO UPDATE SET ($this->dataCol, $this->lifetimeCol, $this->timeCol) = (:data, :lifetime, :time) WHERE $this->idCol = :id";
+                    "ON CONFLICT ($this->idCol) DO UPDATE SET ($this->dataCol, $this->lifetimeCol, $this->timeCol) = (EXCLUDED.$this->dataCol, EXCLUDED.$this->lifetimeCol, EXCLUDED.$this->timeCol)";
         }
     }