diff --git a/__tests__/docker.test.ts b/__tests__/docker.test.ts
index 9735031..a0381a4 100644
--- a/__tests__/docker.test.ts
+++ b/__tests__/docker.test.ts
@@ -50,7 +50,7 @@ describe('configDir', () => {
 describe('isAvailable', () => {
   it('cli', () => {
     const execSpy = jest.spyOn(exec, 'getExecOutput');
-    Docker.isAvailable();
+    Docker.isAvailable;
     // eslint-disable-next-line jest/no-standalone-expect
     expect(execSpy).toHaveBeenCalledWith(`docker`, undefined, {
       silent: true,
diff --git a/src/buildx/buildx.ts b/src/buildx/buildx.ts
index ed3fce2..a46cdf4 100644
--- a/src/buildx/buildx.ts
+++ b/src/buildx/buildx.ts
@@ -39,7 +39,7 @@ export class Buildx {
     this.context = opts.context;
     this.inputs = new Inputs(this.context);
     this.install = new Install({standalone: opts.standalone});
-    this.standalone = opts?.standalone ?? !Docker.isAvailable();
+    this.standalone = opts?.standalone ?? !Docker.isAvailable;
   }
 
   public getCommand(args: Array<string>) {
diff --git a/src/docker.ts b/src/docker.ts
index 186c43e..2b86de7 100644
--- a/src/docker.ts
+++ b/src/docker.ts
@@ -23,7 +23,7 @@ export class Docker {
     return process.env.DOCKER_CONFIG || path.join(os.homedir(), '.docker');
   }
 
-  public static isAvailable(): boolean {
+  static get isAvailable(): boolean {
     let dockerAvailable = false;
     exec
       .getExecOutput('docker', undefined, {
@@ -45,7 +45,7 @@ export class Docker {
   }
 
   public static async printVersion(standalone?: boolean) {
-    const noDocker = standalone ?? !Docker.isAvailable();
+    const noDocker = standalone ?? !Docker.isAvailable;
     if (noDocker) {
       return;
     }
@@ -55,7 +55,7 @@ export class Docker {
   }
 
   public static async printInfo(standalone?: boolean) {
-    const noDocker = standalone ?? !Docker.isAvailable();
+    const noDocker = standalone ?? !Docker.isAvailable;
     if (noDocker) {
       return;
     }