diff --git a/pkg/converter/linker.go b/pkg/converter/linker.go
index 06fad24..d0a8164 100644
--- a/pkg/converter/linker.go
+++ b/pkg/converter/linker.go
@@ -9,8 +9,8 @@ import (
 )
 
 const (
-	fqdnTemplate    = "%s.%s.%s"                       // app.service.project
-	hostPortPattern = `([a-z]+[a-z0-9._-]*)(:[0-9]+)?` // sloppy appName conform
+	fqdnTemplate    = "%s.%s.%s"                          // app.service.project
+	hostPortPattern = `([a-z][a-z0-9._-]*)(:[0-9]{2,5})?` // sloppy appName conform
 	schemePattern   = `^(\w+)(:\/\/)+`
 )
 
@@ -50,13 +50,19 @@ func (l *Linker) GetByApp(name string) *link {
 }
 
 func (l *Linker) Resolve(cf *ComposeFile, sf *SloppyFile) error {
+	const at = "@"
 	l.buildLinks(sf)
 
 	// resolve possible connections
 	for _, link := range l.links {
 		for key, val := range link.app.App.EnvVars {
 			app := link.app.App
-			match := l.FindServiceString(key, val)
+			var match string
+			if strings.Contains(val, at) { // handling admin:pass@urls
+				match = l.FindServiceString(key, strings.Split(val, at)[1])
+			} else {
+				match = l.FindServiceString(key, val)
+			}
 			if match == "" {
 				continue
 			}
diff --git a/pkg/converter/linker_test.go b/pkg/converter/linker_test.go
index 0086e5a..898ffa3 100644
--- a/pkg/converter/linker_test.go
+++ b/pkg/converter/linker_test.go
@@ -79,6 +79,51 @@ func TestLinker_Resolve(t *testing.T) {
 
 }
 
+func TestLinker_ResolveUsrPwd(t *testing.T) {
+	linker := &converter.Linker{}
+	name := "sloppy-test"
+
+	expected := &converter.SloppyFile{
+		Version: "v1",
+		Project: name,
+		Services: map[string]converter.SloppyApps{
+			"apps": {
+				"a": &converter.SloppyApp{
+					App: &sloppy.App{
+						Dependencies: []string{"../apps/b"},
+						EnvVars: map[string]string{
+							"API_AUTH": fmt.Sprintf("https://admin:pass@b.apps.%s:443", name),
+							"API_URL":  fmt.Sprintf("b.apps.%s:443", name),
+						},
+						Image: ToStrPtr("hugo"),
+					},
+					Env: converter.SloppyEnvSlice{
+						{"API_AUTH": fmt.Sprintf("https://admin:pass@b.apps.%s:443", name)},
+						{"API_URL": fmt.Sprintf("b.apps.%s:443", name)},
+					},
+				},
+				"b": &converter.SloppyApp{
+					App: &sloppy.App{
+						Image: ToStrPtr("go:rulez"),
+					},
+					Port: ToIntPtr(4443),
+				},
+			},
+		},
+	}
+
+	cf, sf := loadSloppyFile("/testdata/fixture_linker1.yml")
+	err := linker.Resolve(cf, sf)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if diff := cmp.Diff(sf, expected); diff != "" {
+		t.Errorf("Result differs: (-got +want)\n%s", diff)
+	}
+
+}
+
 func ToIntPtr(i int) *int {
 	return &i
 }
diff --git a/pkg/converter/testdata/fixture_linker1.yml b/pkg/converter/testdata/fixture_linker1.yml
new file mode 100644
index 0000000..8b32a9a
--- /dev/null
+++ b/pkg/converter/testdata/fixture_linker1.yml
@@ -0,0 +1,13 @@
+version: "2"
+
+services:
+  a:
+    image: hugo
+    environment:
+    - API_URL=b:443
+    # even if this is not a html standard and are not supported by any major browser
+    - API_AUTH=https://admin:pass@b:443
+  b:
+    image: go:rulez
+    ports:
+    - 443:4443