diff --git a/README.md b/README.md
index d968eddb..ddc54b0b 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ Then copy the contents of the `.txt` file to your GH secrets
 
 ### `keyPassword`
 
-**Required:** The private key password for your signing keystore
+**Optional:** The private key password for your signing keystore
 
 ## Outputs
 
diff --git a/action.yml b/action.yml
index f064b36d..5bda3c5f 100644
--- a/action.yml
+++ b/action.yml
@@ -19,7 +19,7 @@ inputs:
     required: true
   keyPassword:
     description: 'The password for the key'
-    required: true
+    required: false
 outputs:
   signedReleaseFile:
     description: 'The signed release APK or AAB file'
diff --git a/lib/signing.js b/lib/signing.js
index 79c98b4c..ecad2e69 100644
--- a/lib/signing.js
+++ b/lib/signing.js
@@ -45,15 +45,18 @@ function signApkFile(apkFile, signingKeyFile, alias, keyStorePassword, keyPasswo
         core.debug(`Found 'apksigner' @ ${apkSigner}`);
         // apksigner sign --ks my-release-key.jks --out my-app-release.apk my-app-unsigned-aligned.apk
         const signedApkFile = apkFile.replace('.apk', '-signed.apk');
-        yield exec.exec(`"${apkSigner}"`, [
+        const args = [
             'sign',
             '--ks', signingKeyFile,
             '--ks-key-alias', alias,
             '--ks-pass', `pass:${keyStorePassword}`,
-            '--key-pass', `pass:${keyPassword}`,
-            '--out', signedApkFile,
-            alignedApkFile
-        ]);
+            '--out', signedApkFile
+        ];
+        if (keyPassword) {
+            args.push('--key-pass', `pass:${keyPassword}`);
+        }
+        args.push(alignedApkFile);
+        yield exec.exec(`"${apkSigner}"`, args);
         // Verify
         core.debug("Verifying Signed APK");
         yield exec.exec(`"${apkSigner}"`, [
@@ -69,13 +72,15 @@ function signAabFile(aabFile, signingKeyFile, alias, keyStorePassword, keyPasswo
         core.debug("Signing AAB file");
         const jarSignerPath = yield io.which('jarsigner', true);
         core.debug(`Found 'jarsigner' @ ${jarSignerPath}`);
-        yield exec.exec(`"${jarSignerPath}"`, [
+        const args = [
             '-keystore', signingKeyFile,
             '-storepass', keyStorePassword,
-            '-keypass', keyPassword,
-            aabFile,
-            alias
-        ]);
+        ];
+        if (keyPassword) {
+            args.push('-keypass', keyPassword);
+        }
+        args.push(aabFile, alias);
+        yield exec.exec(`"${jarSignerPath}"`, args);
         return aabFile;
     });
 }
diff --git a/src/signing.ts b/src/signing.ts
index 3ad3d8a6..d92ce3d6 100644
--- a/src/signing.ts
+++ b/src/signing.ts
@@ -9,7 +9,7 @@ export async function signApkFile(
     signingKeyFile: string,
     alias: string,
     keyStorePassword: string,
-    keyPassword: string
+    keyPassword?: string
 ): Promise<string> {
 
     core.debug("Zipaligning APK file");
@@ -41,15 +41,20 @@ export async function signApkFile(
 
     // apksigner sign --ks my-release-key.jks --out my-app-release.apk my-app-unsigned-aligned.apk
     const signedApkFile = apkFile.replace('.apk', '-signed.apk');
-    await exec.exec(`"${apkSigner}"`, [
+    const args = [
         'sign',
         '--ks', signingKeyFile,
         '--ks-key-alias', alias,
         '--ks-pass', `pass:${keyStorePassword}`,
-        '--key-pass', `pass:${keyPassword}`,
-        '--out', signedApkFile,
-        alignedApkFile
-    ]);
+        '--out', signedApkFile
+    ];
+
+    if (keyPassword) {
+        args.push('--key-pass', `pass:${keyPassword}`);
+    }
+    args.push(alignedApkFile);
+
+    await exec.exec(`"${apkSigner}"`, args);
 
     // Verify
     core.debug("Verifying Signed APK");
@@ -66,19 +71,23 @@ export async function signAabFile(
     signingKeyFile: string,
     alias: string,
     keyStorePassword: string,
-    keyPassword: string
+    keyPassword?: string,
 ): Promise<string> {
     core.debug("Signing AAB file");
     const jarSignerPath = await io.which('jarsigner', true);
     core.debug(`Found 'jarsigner' @ ${jarSignerPath}`);
-
-    await exec.exec(`"${jarSignerPath}"`, [
+    const args = [
         '-keystore', signingKeyFile,
         '-storepass', keyStorePassword,
-        '-keypass', keyPassword,
-        aabFile,
-        alias
-    ]);
+    ];
+
+    if (keyPassword) {
+        args.push('-keypass', keyPassword);
+    }
+
+    args.push(aabFile, alias);
+
+    await exec.exec(`"${jarSignerPath}"`, args);
 
     return aabFile
 }
\ No newline at end of file