diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8d483db50..789976aac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Change Log
 
+## v2.7.0
+
+* Added support for specifying versions of **NDK** and **CMake** to install.
+
 ## v2.6.2
 
 * Fixed an issue where the Linux command-line tools binary is used for `macos`.
diff --git a/README.md b/README.md
index 43bce09fd..9255cd556 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,25 @@ jobs:
         script: ./gradlew connectedCheck
 ```
 
+If you need specific versions of **NDK** and **CMake** installed:
+
+```
+jobs:
+  test:
+    runs-on: macos-latest
+    steps:
+    - name: checkout
+      uses: actions/checkout@v2
+
+    - name: run tests
+      uses: reactivecircus/android-emulator-runner@v2
+      with:
+        api-level: 29
+        ndk: 21.0.6113669
+        cmake: 3.10.2.4988404
+        script: ./gradlew connectedCheck
+```
+
 ## Configurations
 
 |  | **Required** | **Default** | **Description** |
@@ -79,6 +98,8 @@ jobs:
 | `disable-animations` | Optional | `true` | Whether to disable animations - `true` or `false`. |
 | `emulator-build` | Optional | N/A | Build number of a specific version of the emulator binary to use e.g. `6061023` for emulator v29.3.0.0. |
 | `working-directory` | Optional | `./` | A custom working directory - e.g. `./android` if your root Gradle project is under the `./android` sub-directory within your repository. |
+| `ndk` | Optional | N/A | Version of NDK to install - e.g. `21.0.6113669` |
+| `cmake` | Optional | N/A | Version of CMake to install - e.g. `3.10.2.4988404` |
 | `script` | Required | N/A | Custom script to run - e.g. to run Android instrumented tests on the emulator: `./gradlew connectedCheck` |
 
 Default `emulator-options`: `-no-window -gpu swiftshader_indirect -no-snapshot -noaudio -no-boot-anim`.
diff --git a/action.yml b/action.yml
index e71bb0123..6d8976d81 100644
--- a/action.yml
+++ b/action.yml
@@ -15,7 +15,7 @@ inputs:
     description: 'CPU architecture of the system image - x86 or x86_64'
     default: 'x86'
   profile:
-    description: 'Hardware profile used for creating the AVD - e.g. `Nexus 6`.'
+    description: 'hardware profile used for creating the AVD - e.g. `Nexus 6`.'
   emulator-options:
     description: 'command-line options used when launching the emulator - e.g. `-no-window -no-snapshot -camera-back emulated`.'
     default: '-no-window -gpu swiftshader_indirect -no-snapshot -noaudio -no-boot-anim'
@@ -23,7 +23,13 @@ inputs:
     description: 'whether to disable animations - true or false'
     default: 'true'
   emulator-build:
-    description: 'build number of a specific version of the emulator binary to use e.g. `6061023` for emulator v29.3.0.0.'
+    description: 'build number of a specific version of the emulator binary to use - e.g. `6061023` for emulator v29.3.0.0.'
+  working-directory:
+    description: 'A custom working directory - e.g. `./android` if your root Gradle project is under the `./android` sub-directory within your repository.'
+  ndk:
+    description: 'version of NDK to install - e.g. 21.0.6113669'
+  cmake:
+    description: 'version of CMake to install - e.g. 3.10.2.4988404'
   script:
     description: 'custom script to run - e.g. `./gradlew connectedCheck`'
     required: true
diff --git a/lib/main.js b/lib/main.js
index d9a61644a..367f7e437 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -70,6 +70,18 @@ function run() {
                 console.log(`custom working directory: ${workingDirectoryInput}`);
             }
             const workingDirectory = !workingDirectoryInput ? undefined : workingDirectoryInput;
+            // version of NDK to install
+            const ndkInput = core.getInput('ndk');
+            if (ndkInput) {
+                console.log(`version of NDK to install: ${ndkInput}`);
+            }
+            const ndkVersion = !ndkInput ? undefined : ndkInput;
+            // version of CMake to install
+            const cmakeInput = core.getInput('cmake');
+            if (cmakeInput) {
+                console.log(`version of CMake to install: ${cmakeInput}`);
+            }
+            const cmakeVersion = !cmakeInput ? undefined : cmakeInput;
             // custom script to run
             const scriptInput = core.getInput('script', { required: true });
             const scripts = script_parser_1.parseScript(scriptInput);
@@ -78,7 +90,7 @@ function run() {
                 console.log(`${script}`);
             }));
             // install SDK
-            yield sdk_installer_1.installAndroidSdk(apiLevel, target, arch, emulatorBuild);
+            yield sdk_installer_1.installAndroidSdk(apiLevel, target, arch, emulatorBuild, ndkVersion, cmakeVersion);
             // launch an emulator
             yield emulator_manager_1.launchEmulator(apiLevel, target, arch, profile, emulatorOptions, disableAnimations);
             // execute the custom script
diff --git a/lib/sdk-installer.js b/lib/sdk-installer.js
index 9a96b13fd..112cfdca8 100644
--- a/lib/sdk-installer.js
+++ b/lib/sdk-installer.js
@@ -24,7 +24,7 @@ const CMDLINE_TOOLS_URL_LINUX = 'https://dl.google.com/android/repository/comman
  * Installs & updates the Android SDK for the macOS platform, including SDK platform for the chosen API level, latest build tools, platform tools, Android Emulator,
  * and the system image for the chosen API level, CPU arch, and target.
  */
-function installAndroidSdk(apiLevel, target, arch, emulatorBuild) {
+function installAndroidSdk(apiLevel, target, arch, emulatorBuild, ndkVersion, cmakeVersion) {
     return __awaiter(this, void 0, void 0, function* () {
         const isOnMac = process.platform === 'darwin';
         console.log('Installing new cmdline-tools.');
@@ -55,6 +55,14 @@ function installAndroidSdk(apiLevel, target, arch, emulatorBuild) {
         }
         console.log('Installing system images.');
         yield exec.exec(`sh -c \\"sdkmanager --install 'system-images;android-${apiLevel};${target};${arch}' > /dev/null"`);
+        if (ndkVersion) {
+            console.log(`Installing NDK ${ndkVersion}.`);
+            yield exec.exec(`sh -c \\"sdkmanager --install 'ndk;${ndkVersion}' > /dev/null"`);
+        }
+        if (cmakeVersion) {
+            console.log(`Installing CMake ${cmakeVersion}.`);
+            yield exec.exec(`sh -c \\"sdkmanager --install 'cmake;${cmakeVersion}' > /dev/null"`);
+        }
     });
 }
 exports.installAndroidSdk = installAndroidSdk;
diff --git a/package-lock.json b/package-lock.json
index f6e9cc8de..e4e3073e1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4937,20 +4937,12 @@
       }
     },
     "mkdirp": {
-      "version": "0.5.1",
-      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
-      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+      "version": "0.5.5",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
+      "integrity": "sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==",
       "dev": true,
       "requires": {
-        "minimist": "0.0.8"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "0.0.8",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
-          "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
-          "dev": true
-        }
+        "minimist": "^1.2.5"
       }
     },
     "ms": {
diff --git a/src/main.ts b/src/main.ts
index 447a79352..721f315f6 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -63,6 +63,20 @@ async function run() {
     }
     const workingDirectory = !workingDirectoryInput ? undefined : workingDirectoryInput;
 
+    // version of NDK to install
+    const ndkInput = core.getInput('ndk');
+    if (ndkInput) {
+      console.log(`version of NDK to install: ${ndkInput}`);
+    }
+    const ndkVersion = !ndkInput ? undefined : ndkInput;
+
+    // version of CMake to install
+    const cmakeInput = core.getInput('cmake');
+    if (cmakeInput) {
+      console.log(`version of CMake to install: ${cmakeInput}`);
+    }
+    const cmakeVersion = !cmakeInput ? undefined : cmakeInput;
+
     // custom script to run
     const scriptInput = core.getInput('script', { required: true });
     const scripts = parseScript(scriptInput);
@@ -72,7 +86,7 @@ async function run() {
     });
 
     // install SDK
-    await installAndroidSdk(apiLevel, target, arch, emulatorBuild);
+    await installAndroidSdk(apiLevel, target, arch, emulatorBuild, ndkVersion, cmakeVersion);
 
     // launch an emulator
     await launchEmulator(apiLevel, target, arch, profile, emulatorOptions, disableAnimations);
diff --git a/src/sdk-installer.ts b/src/sdk-installer.ts
index 3833de013..d39e9c33f 100644
--- a/src/sdk-installer.ts
+++ b/src/sdk-installer.ts
@@ -9,7 +9,7 @@ const CMDLINE_TOOLS_URL_LINUX = 'https://dl.google.com/android/repository/comman
  * Installs & updates the Android SDK for the macOS platform, including SDK platform for the chosen API level, latest build tools, platform tools, Android Emulator,
  * and the system image for the chosen API level, CPU arch, and target.
  */
-export async function installAndroidSdk(apiLevel: number, target: string, arch: string, emulatorBuild?: string): Promise<void> {
+export async function installAndroidSdk(apiLevel: number, target: string, arch: string, emulatorBuild?: string, ndkVersion?: string, cmakeVersion?: string): Promise<void> {
   const isOnMac = process.platform === 'darwin';
   console.log('Installing new cmdline-tools.');
   const sdkUrl = isOnMac ? CMDLINE_TOOLS_URL_MAC : CMDLINE_TOOLS_URL_LINUX;
@@ -42,4 +42,13 @@ export async function installAndroidSdk(apiLevel: number, target: string, arch:
   }
   console.log('Installing system images.');
   await exec.exec(`sh -c \\"sdkmanager --install 'system-images;android-${apiLevel};${target};${arch}' > /dev/null"`);
+
+  if (ndkVersion) {
+    console.log(`Installing NDK ${ndkVersion}.`);
+    await exec.exec(`sh -c \\"sdkmanager --install 'ndk;${ndkVersion}' > /dev/null"`);
+  }
+  if (cmakeVersion) {
+    console.log(`Installing CMake ${cmakeVersion}.`);
+    await exec.exec(`sh -c \\"sdkmanager --install 'cmake;${cmakeVersion}' > /dev/null"`);
+  }
 }