diff --git a/Dockerfile.spark b/Dockerfile.spark
index 0203eed1..7fa213b5 100644
--- a/Dockerfile.spark
+++ b/Dockerfile.spark
@@ -7,6 +7,11 @@ USER 0
 # ----------
 # Setup Python and Livy/Spark Deps
 #
+# Install GCP keys to avoid error:
+# "GPG error: https://packages.cloud.google.com/apt cloud-sdk InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B53DC80D13EDEF05"
+RUN apt-get install apt-transport-https ca-certificates gnupg
+RUN echo "deb [signed-by=/usr/share/keyrings/cloud.google.gpg] https://packages.cloud.google.com/apt cloud-sdk main" | tee -a /etc/apt/sources.list.d/google-cloud-sdk.list
+RUN curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key --keyring /usr/share/keyrings/cloud.google.gpg add -
 # Livy Requires:
 # - mvn (from maven package or maven3 tarball)
 # - openjdk-8-jdk (or Oracle JDK 8)