diff --git a/auth/on_notify.go b/auth/on_notify.go
index c05280e..82fbf12 100644
--- a/auth/on_notify.go
+++ b/auth/on_notify.go
@@ -9,7 +9,7 @@ import (
 	"git.loafle.net/overflow/overflow_probes/central/api/module"
 )
 
-func (h *authHandlers) onNotify(method string, params interface{}) {
+func (h *authHandlers) onNotify(method string, params []string) {
 	switch method {
 	case module.NoAuthProbeService_AcceptNoAuthProbe:
 		h.onNoAuthProbeAccept(params)
@@ -21,10 +21,9 @@ func (h *authHandlers) onNotify(method string, params interface{}) {
 
 }
 
-func (h *authHandlers) onNoAuthProbeAccept(params interface{}) {
+func (h *authHandlers) onNoAuthProbeAccept(params []string) {
 	var err error
-	ps := params.([]string)
-	probeID := ps[0]
+	probeID := params[0]
 
 	if lfcc.Exists(h.probeConfigPath) {
 		if err = lfcc.Load(&h.probeConfig, h.probeConfigPath); nil != err {
@@ -40,7 +39,7 @@ func (h *authHandlers) onNoAuthProbeAccept(params interface{}) {
 	h.acceptedChan <- true
 }
 
-func (h *authHandlers) onNoAuthProbeDeny(params interface{}) {
+func (h *authHandlers) onNoAuthProbeDeny(params []string) {
 	n := time.Now()
 	h.noAuthConfig.DenyDate = &n
 	if err := lfcc.Save(h.noAuthConfig, h.noAuthConfigPath, true); nil != err {
diff --git a/central/client/client.go b/central/client/client.go
index ed25f67..0ac44e6 100644
--- a/central/client/client.go
+++ b/central/client/client.go
@@ -19,7 +19,7 @@ const (
 )
 
 type (
-	OnNotifyFunc func(method string, params interface{})
+	OnNotifyFunc func(method string, params []string)
 	OnCloseFunc  func(code int, text string)
 )
 
@@ -33,7 +33,7 @@ var ErrShutdown = errors.New("connection is shut down")
 
 type Call struct {
 	Method string      // The name of the service and method to call.
-	Args   interface{} // The argument to the function (*struct).
+	Args   []string    // The argument to the function (*struct).
 	Result interface{} // The reply from the function (*struct).
 	Error  error       // After completion, the error status.
 	Done   chan *Call  // Strobes when call is complete.
@@ -52,8 +52,8 @@ func (c *Call) done() {
 
 type Client interface {
 	Dial(url string, header http.Header, readBufSize int, writeBufSize int) (*http.Response, error)
-	Call(method string, args interface{}, result interface{}) error
-	Notify(method string, args interface{}) error
+	Call(method string, args []string, result interface{}) error
+	Notify(method string, args []string) error
 	OnNotify(cb OnNotifyFunc)
 	OnClose(cb OnCloseFunc)
 	Shutdown(ctx context.Context) error
@@ -103,12 +103,12 @@ func (c *client) Dial(url string, header http.Header, readBufSize int, writeBufS
 	return res, nil
 }
 
-func (c *client) Call(method string, args interface{}, result interface{}) error {
+func (c *client) Call(method string, args []string, result interface{}) error {
 	call := <-c.goCall(method, args, result, make(chan *Call, 1)).Done
 	return call.Error
 }
 
-func (c *client) Notify(method string, args interface{}) error {
+func (c *client) Notify(method string, args []string) error {
 	c.sendMutex.Lock()
 	defer c.sendMutex.Unlock()
 
@@ -146,7 +146,7 @@ func (c *client) Shutdown(ctx context.Context) error {
 // the invocation. The done channel will signal when the call is complete by returning
 // the same Call object. If done is nil, Go will allocate a new channel.
 // If non-nil, done must be buffered or Go will deliberately crash.
-func (c *client) goCall(method string, args interface{}, result interface{}, done chan *Call) *Call {
+func (c *client) goCall(method string, args []string, result interface{}, done chan *Call) *Call {
 	call := new(Call)
 	call.Method = method
 	call.Args = args
diff --git a/central/client/protocol/notification.go b/central/client/protocol/notification.go
index 0f93fa7..c369e41 100644
--- a/central/client/protocol/notification.go
+++ b/central/client/protocol/notification.go
@@ -2,6 +2,6 @@ package protocol
 
 type Notification struct {
 	Header
-	Method string      `json:"method"`
-	Params interface{} `json:"params,omitempty"`
+	Method string   `json:"method"`
+	Params []string `json:"params,omitempty"`
 }
diff --git a/overflow_probes b/overflow_probes
new file mode 100755
index 0000000..6c509c0
Binary files /dev/null and b/overflow_probes differ
diff --git a/probe/probe.go b/probe/probe.go
index 1f38375..b002f5e 100644
--- a/probe/probe.go
+++ b/probe/probe.go
@@ -113,7 +113,7 @@ func (p *probe) connectToCentral() error {
 	return nil
 }
 
-func (p *probe) onNotify(method string, params interface{}) {
+func (p *probe) onNotify(method string, params []string) {
 	switch method {
 	case module.NoAuthProbeService_AcceptNoAuthProbe: