diff --git a/internal/db/migrations/postgres.gen.go b/internal/db/migrations/postgres.gen.go
index 2471f25260..dadc4e0e3e 100644
--- a/internal/db/migrations/postgres.gen.go
+++ b/internal/db/migrations/postgres.gen.go
@@ -1705,7 +1705,7 @@ begin;
     description text,
     create_time wt_timestamp,
     update_time wt_timestamp,
-    min_user_name_length int not null default 5,
+    min_user_name_length int not null default 3,
     min_password_length int not null default 8,
     foreign key (scope_id, public_id)
       references auth_method (scope_id, public_id)
diff --git a/internal/db/migrations/postgres/12_auth_password.up.sql b/internal/db/migrations/postgres/12_auth_password.up.sql
index 858c77bf14..44df77d708 100644
--- a/internal/db/migrations/postgres/12_auth_password.up.sql
+++ b/internal/db/migrations/postgres/12_auth_password.up.sql
@@ -64,7 +64,7 @@ begin;
     description text,
     create_time wt_timestamp,
     update_time wt_timestamp,
-    min_user_name_length int not null default 5,
+    min_user_name_length int not null default 3,
     min_password_length int not null default 8,
     foreign key (scope_id, public_id)
       references auth_method (scope_id, public_id)
diff --git a/internal/servers/controller/handlers/authmethods/authmethod_service_test.go b/internal/servers/controller/handlers/authmethods/authmethod_service_test.go
index 6d2ca67e96..16cc92ddc6 100644
--- a/internal/servers/controller/handlers/authmethods/authmethod_service_test.go
+++ b/internal/servers/controller/handlers/authmethods/authmethod_service_test.go
@@ -45,7 +45,7 @@ func TestGet(t *testing.T) {
 		Type:        "password",
 		Attributes: &structpb.Struct{Fields: map[string]*structpb.Value{
 			"min_password_length":  structpb.NewNumberValue(8),
-			"min_user_name_length": structpb.NewNumberValue(5),
+			"min_user_name_length": structpb.NewNumberValue(3),
 		}},
 		Scope: &scopes.ScopeInfo{
 			Id:   o.GetPublicId(),
@@ -125,7 +125,7 @@ func TestList(t *testing.T) {
 			Type:        "password",
 			Attributes: &structpb.Struct{Fields: map[string]*structpb.Value{
 				"min_password_length":  structpb.NewNumberValue(8),
-				"min_user_name_length": structpb.NewNumberValue(5),
+				"min_user_name_length": structpb.NewNumberValue(3),
 			}},
 		})
 	}
@@ -140,7 +140,7 @@ func TestList(t *testing.T) {
 			Type:        "password",
 			Attributes: &structpb.Struct{Fields: map[string]*structpb.Value{
 				"min_password_length":  structpb.NewNumberValue(8),
-				"min_user_name_length": structpb.NewNumberValue(5),
+				"min_user_name_length": structpb.NewNumberValue(3),
 			}},
 		})
 	}
@@ -313,7 +313,7 @@ func TestCreate(t *testing.T) {
 					Type:        "password",
 					Attributes: &structpb.Struct{Fields: map[string]*structpb.Value{
 						"min_password_length":  structpb.NewNumberValue(8),
-						"min_user_name_length": structpb.NewNumberValue(5),
+						"min_user_name_length": structpb.NewNumberValue(3),
 					}},
 				},
 			},
@@ -371,7 +371,7 @@ func TestCreate(t *testing.T) {
 				Type:        "password",
 				Attributes: &structpb.Struct{Fields: map[string]*structpb.Value{
 					"invalid_field":        structpb.NewStringValue("invalid_value"),
-					"min_user_name_length": structpb.NewNumberValue(5),
+					"min_user_name_length": structpb.NewNumberValue(3),
 				}},
 			}},
 			res:     nil,
@@ -465,7 +465,7 @@ func TestUpdate(t *testing.T) {
 					Type:        "password",
 					Attributes: &structpb.Struct{Fields: map[string]*structpb.Value{
 						"min_password_length":  structpb.NewNumberValue(8),
-						"min_user_name_length": structpb.NewNumberValue(5),
+						"min_user_name_length": structpb.NewNumberValue(3),
 					}},
 				},
 			},
@@ -489,7 +489,7 @@ func TestUpdate(t *testing.T) {
 					Type:        "password",
 					Attributes: &structpb.Struct{Fields: map[string]*structpb.Value{
 						"min_password_length":  structpb.NewNumberValue(8),
-						"min_user_name_length": structpb.NewNumberValue(5),
+						"min_user_name_length": structpb.NewNumberValue(3),
 					}},
 				},
 			},
@@ -543,7 +543,7 @@ func TestUpdate(t *testing.T) {
 					Type:        "password",
 					Attributes: &structpb.Struct{Fields: map[string]*structpb.Value{
 						"min_password_length":  structpb.NewNumberValue(8),
-						"min_user_name_length": structpb.NewNumberValue(5),
+						"min_user_name_length": structpb.NewNumberValue(3),
 					}},
 				},
 			},
@@ -567,7 +567,7 @@ func TestUpdate(t *testing.T) {
 					Type:        "password",
 					Attributes: &structpb.Struct{Fields: map[string]*structpb.Value{
 						"min_password_length":  structpb.NewNumberValue(8),
-						"min_user_name_length": structpb.NewNumberValue(5),
+						"min_user_name_length": structpb.NewNumberValue(3),
 					}},
 				},
 			},
@@ -591,7 +591,7 @@ func TestUpdate(t *testing.T) {
 					Type:        "password",
 					Attributes: &structpb.Struct{Fields: map[string]*structpb.Value{
 						"min_password_length":  structpb.NewNumberValue(8),
-						"min_user_name_length": structpb.NewNumberValue(5),
+						"min_user_name_length": structpb.NewNumberValue(3),
 					}},
 				},
 			},