diff --git a/google_assistant/Dockerfile b/google_assistant/Dockerfile
index 238effe..3e60639 100644
--- a/google_assistant/Dockerfile
+++ b/google_assistant/Dockerfile
@@ -4,7 +4,11 @@ FROM $BUILD_FROM
 # Install packages
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
-        jq tzdata python3 python3-dev python3-pip libportaudio2 alsa-utils \
+        python3 \
+        python3-dev \
+        python3-pip \
+        libportaudio2 \
+        alsa-utils \
     && pip3 install --no-cache-dir --upgrade \
         setuptools==41.0.1 \
         pip==19.1 \
@@ -12,7 +16,9 @@ RUN apt-get update \
         google-assistant-library==1.0.0 \
         google-assistant-sdk==0.5.0 \
         google-assistant-grpc==0.2.0 \
-        google-auth requests_oauthlib cherrypy \
+        google-auth==1.6.3 \
+        requests_oauthlib==1.2.0 \
+        cherrypy==18.1.1 \
     && apt-get remove -y --purge python3-pip python3-dev \
     && apt-get clean -y \
     && rm -rf /var/lib/apt/lists/*