diff --git a/lib/main.js b/lib/main.js
index ade00b39..b51afce8 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -163,7 +163,12 @@ Lambda.prototype._params = (program, buffer) => {
     Description: program.description,
     MemorySize: program.memorySize,
     Timeout: program.timeout,
-    Publish: program.publish,
+    Publish: (() => {
+      if (typeof program.publish === 'boolean') {
+        return program.publish
+      }
+      return program.publish === 'true'
+    })(),
     VpcConfig: {
       SubnetIds: [],
       SecurityGroupIds: []
diff --git a/test/main.js b/test/main.js
index 5eaa2618..74623dd8 100644
--- a/test/main.js
+++ b/test/main.js
@@ -222,6 +222,35 @@ describe('lib/main', function () {
       assert.isNull(params.TracingConfig.Mode)
     })
 
+    describe('params.Publish', () => {
+      describe('boolean', () => {
+        it('If true, it is set to true', () => {
+          program.publish = true
+          const params = lambda._params(program)
+          assert.isTrue(params.Publish)
+        })
+        it('If false, it is set to false', () => {
+          program.publish = false
+          const params = lambda._params(program)
+          assert.isFalse(params.Publish)
+        })
+      })
+
+      describe('string', () => {
+        it('If "true", it is set to true', () => {
+          program.publish = 'true'
+          const params = lambda._params(program)
+          assert.isTrue(params.Publish)
+        })
+        it('If not "true", it is set to false', () => {
+          program.publish = 'false'
+          assert.isFalse(lambda._params(program).Publish)
+          program.publish = 'aaa'
+          assert.isFalse(lambda._params(program).Publish)
+        })
+      })
+    })
+
     describe('configFile', () => {
       beforeEach(() => {
         // Prep...