diff --git a/env_short_long_name.go b/env_short_long_name.go
index 35539c0..22703e5 100644
--- a/env_short_long_name.go
+++ b/env_short_long_name.go
@@ -12,7 +12,8 @@ var specialNames = map[string]bool{
 	"JSON": true,
 	"XML":  true,
 	"YAML": true,
-	// Add more special names here
+	"URL":  true,
+	"URI":  true,
 }
 
 func wordStart(b byte) bool {
diff --git a/env_short_long_name_test.go b/env_short_long_name_test.go
index c1b583f..edfaec1 100644
--- a/env_short_long_name_test.go
+++ b/env_short_long_name_test.go
@@ -19,6 +19,8 @@ func Test_ShortLongName(t *testing.T) {
 		{"_almost_all", "almost-all"},
 		{"LongOpt_all", "long-opt-all"},
 		{"JSON", "JSON"},
+		{"URL", "URL"},
+		{"URI", "URI"},
 	} {
 		got, err := gnuOptionName(tcase.in)
 		assert.NoError(t, err)
@@ -34,6 +36,8 @@ func Test_EnvName(t *testing.T) {
 		{"_almost_all", "ALMOST_ALL"},
 		{"envOpt_all", "ENV_OPT_ALL"},
 		{"JSON", "JSON"},
+		{"URL", "URL"},
+		{"URI", "URI"},
 	} {
 		got, err := envOptionName(tcase.in)
 		assert.NoError(t, err)