diff --git a/project_variables.go b/project_variables.go
index e75c74634..9dea091bf 100644
--- a/project_variables.go
+++ b/project_variables.go
@@ -41,6 +41,7 @@ type ProjectVariable struct {
 	VariableType     VariableTypeValue `json:"variable_type"`
 	Protected        bool              `json:"protected"`
 	Masked           bool              `json:"masked"`
+	Hidden           bool              `json:"hidden"`
 	Raw              bool              `json:"raw"`
 	EnvironmentScope string            `json:"environment_scope"`
 	Description      string            `json:"description"`
@@ -132,6 +133,7 @@ type CreateProjectVariableOptions struct {
 	Description      *string            `url:"description,omitempty" json:"description,omitempty"`
 	EnvironmentScope *string            `url:"environment_scope,omitempty" json:"environment_scope,omitempty"`
 	Masked           *bool              `url:"masked,omitempty" json:"masked,omitempty"`
+	MaskedAndHidden  *bool              `url:"masked_and_hidden,omitempty" json:"masked_and_hidden,omitempty"`
 	Protected        *bool              `url:"protected,omitempty" json:"protected,omitempty"`
 	Raw              *bool              `url:"raw,omitempty" json:"raw,omitempty"`
 	VariableType     *VariableTypeValue `url:"variable_type,omitempty" json:"variable_type,omitempty"`
diff --git a/project_variables_test.go b/project_variables_test.go
index 7f2cd8e50..4555525d5 100644
--- a/project_variables_test.go
+++ b/project_variables_test.go
@@ -31,6 +31,7 @@ func TestProjectVariablesService_ListVariables(t *testing.T) {
 		VariableType:     "env_var",
 		Protected:        false,
 		Masked:           false,
+		Hidden:           false,
 		EnvironmentScope: "",
 		Description:      "test variable 1",
 	}}
@@ -69,6 +70,7 @@ func TestProjectVariablesService_GetVariable(t *testing.T) {
 				"value": "TEST_1",
 				"protected": false,
 				"masked": true,
+				"hidden": true,
 				"description": "test variable 1"
 			}
 		`)
@@ -80,6 +82,7 @@ func TestProjectVariablesService_GetVariable(t *testing.T) {
 		VariableType:     "env_var",
 		Protected:        false,
 		Masked:           true,
+		Hidden:           true,
 		EnvironmentScope: "",
 		Description:      "test variable 1",
 	}
@@ -118,6 +121,7 @@ func TestProjectVariablesService_CreateVariable(t *testing.T) {
 				"protected": false,
 				"variable_type": "env_var",
 				"masked": false,
+				"masked_and_hidden": false,
 				"environment_scope": "*",
 				"description": "new variable"
 			}
@@ -130,6 +134,57 @@ func TestProjectVariablesService_CreateVariable(t *testing.T) {
 		VariableType:     "env_var",
 		Protected:        false,
 		Masked:           false,
+		Hidden:           false,
+		EnvironmentScope: "*",
+		Description:      "new variable",
+	}
+
+	pv, resp, err := client.ProjectVariables.CreateVariable(1, &CreateProjectVariableOptions{Description: Ptr("new variable")}, nil)
+	require.NoError(t, err)
+	require.NotNil(t, resp)
+	require.Equal(t, want, pv)
+
+	pv, resp, err = client.ProjectVariables.CreateVariable(1.01, nil, nil)
+	require.EqualError(t, err, "invalid ID type 1.01, the ID must be an int or a string")
+	require.Nil(t, resp)
+	require.Nil(t, pv)
+
+	pv, resp, err = client.ProjectVariables.CreateVariable(1, nil, nil, errorOption)
+	require.EqualError(t, err, "RequestOptionFunc returns an error")
+	require.Nil(t, resp)
+	require.Nil(t, pv)
+
+	pv, resp, err = client.ProjectVariables.CreateVariable(2, nil, nil)
+	require.Error(t, err)
+	require.Nil(t, pv)
+	require.Equal(t, http.StatusNotFound, resp.StatusCode)
+}
+
+func TestProjectVariablesService_CreateVariable_MaskedAndHidden(t *testing.T) {
+	mux, client := setup(t)
+
+	mux.HandleFunc("/api/v4/projects/1/variables", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodPost)
+		testBody(t, r, `{"description":"new variable"}`)
+		fmt.Fprintf(w, `
+			{
+				"key": "NEW_VARIABLE",
+				"protected": false,
+				"variable_type": "env_var",
+				"masked": true,
+				"hidden": true,
+				"environment_scope": "*",
+				"description": "new variable"
+			}
+		`)
+	})
+
+	want := &ProjectVariable{
+		Key:              "NEW_VARIABLE",
+		VariableType:     "env_var",
+		Protected:        false,
+		Masked:           true,
+		Hidden:           true,
 		EnvironmentScope: "*",
 		Description:      "new variable",
 	}
@@ -180,6 +235,61 @@ func TestProjectVariablesService_UpdateVariable(t *testing.T) {
 		VariableType:     "env_var",
 		Protected:        false,
 		Masked:           false,
+		Hidden:           false,
+		EnvironmentScope: "*",
+		Description:      "updated description",
+	}
+
+	pv, resp, err := client.ProjectVariables.UpdateVariable(1, "NEW_VARIABLE", &UpdateProjectVariableOptions{
+		Filter:      &VariableFilter{EnvironmentScope: "prod"},
+		Description: Ptr("updated description"),
+	}, nil)
+	require.NoError(t, err)
+	require.NotNil(t, resp)
+	require.Equal(t, want, pv)
+
+	pv, resp, err = client.ProjectVariables.UpdateVariable(1.01, "NEW_VARIABLE", nil, nil)
+	require.EqualError(t, err, "invalid ID type 1.01, the ID must be an int or a string")
+	require.Nil(t, resp)
+	require.Nil(t, pv)
+
+	pv, resp, err = client.ProjectVariables.UpdateVariable(1, "NEW_VARIABLE", nil, nil, errorOption)
+	require.EqualError(t, err, "RequestOptionFunc returns an error")
+	require.Nil(t, resp)
+	require.Nil(t, pv)
+
+	pv, resp, err = client.ProjectVariables.UpdateVariable(2, "NEW_VARIABLE", nil, nil)
+	require.Error(t, err)
+	require.Nil(t, pv)
+	require.Equal(t, http.StatusNotFound, resp.StatusCode)
+}
+
+func TestProjectVariablesService_UpdateVariable_MaskedAndHidden(t *testing.T) {
+	mux, client := setup(t)
+
+	mux.HandleFunc("/api/v4/projects/1/variables/NEW_VARIABLE", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodPut)
+		testBody(t, r, `{"description":"updated description","filter":{"environment_scope":"prod"}}`)
+		fmt.Fprintf(w, `
+			{
+				"key": "NEW_VARIABLE",
+				"value": null,
+				"protected": false,
+				"variable_type": "env_var",
+				"masked": true,
+				"hidden": true,
+				"environment_scope": "*",
+				"description": "updated description"
+			}
+		`)
+	})
+
+	want := &ProjectVariable{
+		Key:              "NEW_VARIABLE",
+		VariableType:     "env_var",
+		Protected:        false,
+		Masked:           true,
+		Hidden:           true,
 		EnvironmentScope: "*",
 		Description:      "updated description",
 	}