diff --git a/backends/file/client.go b/backends/file/client.go
index 7ee238b0b..7289edd9c 100644
--- a/backends/file/client.go
+++ b/backends/file/client.go
@@ -46,7 +46,7 @@ func readFile(path string, vars map[string]string) error {
 			return err
 		}
 		err = nodeWalk(fileMap, "/", vars)
-	case ".yml", ".yaml":
+	case "", ".yml", ".yaml":
 		fileMap := make(map[interface{}]interface{})
 		err = yaml.Unmarshal(data, &fileMap)
 		if err != nil {
diff --git a/integration/file/test_yaml.sh b/integration/file/test_yaml.sh
index b604de5e6..a2d7ec520 100755
--- a/integration/file/test_yaml.sh
+++ b/integration/file/test_yaml.sh
@@ -2,7 +2,7 @@
 
 export HOSTNAME="localhost"
 mkdir backends1 backends2
-cat <<EOT >> backends1/1.yaml
+cat <<EOT >> backends1/1
 key: foobar
 database:
   host: 127.0.0.1
@@ -11,7 +11,7 @@ database:
   username: confd
 EOT
 
-cat <<EOT >> backends1/2.yaml
+cat <<EOT >> backends1/2.yml
 upstream:
   app1: 10.0.1.10:8080
   app2: 10.0.1.11:8080
diff --git a/version.go b/version.go
index ca563e9a8..89184d714 100644
--- a/version.go
+++ b/version.go
@@ -1,6 +1,6 @@
 package main
 
-const Version = "0.18.3-dev"
+const Version = "0.18.3"
 
 // We want to replace this variable at build time with "-ldflags -X main.GitSHA=xxx", where const is not supported.
 var GitSHA = ""