A connector assembly comprising a connector housing, a secondary locking member and a safety spring bar, whereby the secondary locking member and the safety spring bar are assigned to the connector housing. The secondary locking member is movable between a first and a second position, whereby the safety spring bar is adapted to lock the secondary locking member in its second position. The secondary locking member comprises a deflection surface adapted to engage the safety spring bar when the secondary locking member is moved in an insertion direction. Thereby, upon movement of the secondary locking member, the safety spring bar is deflected essentially in the insertion direction, urging the secondary locking member towards its first position. When the secondary locking member is placed in the second position, the safety spring bar is adapted to snap into a safety position, to lock the secondary locking member in its second position.