diff --git a/internal/nfs/controller/controllerserver.go b/internal/nfs/controller/controllerserver.go
index 31e75abcd..0a46e9a53 100644
--- a/internal/nfs/controller/controllerserver.go
+++ b/internal/nfs/controller/controllerserver.go
@@ -150,3 +150,12 @@ func (cs *Server) DeleteVolume(
 
 	return cs.backendServer.DeleteVolume(ctx, req)
 }
+
+// ControllerExpandVolume calls the backend (CephFS) procedure to expand the
+// volume. There is no interaction with the NFS-server needed to publish the
+// new size.
+func (cs *Server) ControllerExpandVolume(
+	ctx context.Context,
+	req *csi.ControllerExpandVolumeRequest) (*csi.ControllerExpandVolumeResponse, error) {
+	return cs.backendServer.ControllerExpandVolume(ctx, req)
+}
diff --git a/internal/nfs/driver/driver.go b/internal/nfs/driver/driver.go
index 6fae5ef10..7004b8b12 100644
--- a/internal/nfs/driver/driver.go
+++ b/internal/nfs/driver/driver.go
@@ -46,6 +46,7 @@ func (fs *Driver) Run(conf *util.Config) {
 	cd.AddControllerServiceCapabilities([]csi.ControllerServiceCapability_RPC_Type{
 		csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME,
 		csi.ControllerServiceCapability_RPC_SINGLE_NODE_MULTI_WRITER,
+		csi.ControllerServiceCapability_RPC_EXPAND_VOLUME,
 	})
 	// VolumeCapabilities are validated by the CephFS Controller
 	cd.AddVolumeCapabilityAccessModes([]csi.VolumeCapability_AccessMode_Mode{