diff --git a/Gopkg.lock b/Gopkg.lock
index 8dc93511..2c807567 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -74,6 +74,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "ecf27a574f7d4a70a40be14ee6471084c82fc617cef57199bdb72ab9528ecc5e"
+  inputs-digest = "9e272825174ad2baae1001d72800484e2cf91454ad7efdd214ea517034500fce"
   solver-name = "gps-cdcl"
   solver-version = 1
diff --git a/selenoid.go b/selenoid.go
index 62307c1b..8cc9b479 100644
--- a/selenoid.go
+++ b/selenoid.go
@@ -356,7 +356,11 @@ func proxy(w http.ResponseWriter, r *http.Request) {
 				if ok {
 					sess.Lock.Lock()
 					defer sess.Lock.Unlock()
-					close(sess.Timeout)
+					select {
+					case <-sess.Timeout:
+					default:
+						close(sess.Timeout)
+					}
 					if r.Method == http.MethodDelete && len(fragments) == 3 {
 						if enableFileUpload {
 							os.RemoveAll(filepath.Join(os.TempDir(), id))