diff --git a/docker/Emulator_x86 b/docker/Emulator_x86
index b7d9f8e..8b9c6fc 100644
--- a/docker/Emulator_x86
+++ b/docker/Emulator_x86
@@ -89,6 +89,7 @@ ARG PROCESSOR=x86
 ARG SYS_IMG=x86
 ARG IMG_TYPE=google_apis
 ARG BROWSER=android
+ARG CHROME_DRIVER=2.40
 ENV ANDROID_VERSION=$ANDROID_VERSION \
     API_LEVEL=$API_LEVEL \
     PROCESSOR=$PROCESSOR \
@@ -97,6 +98,7 @@ ENV ANDROID_VERSION=$ANDROID_VERSION \
     BROWSER=$BROWSER \
     CHROME_DRIVER=$CHROME_DRIVER
 ENV PATH ${PATH}:${ANDROID_HOME}/build-tools
+
 RUN yes | sdkmanager --licenses && \
     sdkmanager "platforms;android-${API_LEVEL}" "system-images;android-${API_LEVEL};${IMG_TYPE};${SYS_IMG}" "emulator"